Percentage Questions Made Easy for RBI Grade B Exam

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Percentage Questions become part of 30 Quantitative Aptitude questions in the RBI Grade B Phase 1. On average, 5 to 8 of these are percentage questions, based on past year papers. That’s around 20 to 25% of the paper. So this is one topic you must master. In this blog, you’ll learn what percentage questions appear most often, their main rules in easy words, and the simple tricks to solve such problems fast. Practice examples with step-by-step solutions. In addition, you’ll also be given practical examples with solutions to eliminate all the doubts from your mind forever. Alright, let’s get down to business!

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ALSO READ: How to Score Maximum Marks in Cloze Test

What Are Percentage Questions?

In RBI exams, percentage questions are common in:

Direct percentage conversions.
Percentage changes (increase or decrease).
Profit, Loss, and Discount problems (Marked Price and Cost Price calculations).
Mixture and all-igation.
Simple and Compound Interest queries.
Percentage comparison of different data points in DI

Most years, you get 5 to 8 such questions. They may come in Quant or within Data Interpretation sets. Knowing your basics well can help you score here easily.

ALSO READ: How to Score Maximum Marks in Cloze Test & Ratio & Proportion Concepts and Shortcuts for RBI Grade B Exam

Core Rules to Remember

Given are formulae to remember to increase your speed and save your time during the exam:

1. Convert % to fraction and decimal

10% = 10/100 = 0.1
25% = 1/4 = 0.25
5% = 1/20 = 0.05

2. Increase or decrease formula

Increase: New = Original × (1 + percent/100)
Decrease: New = Original × (1 – percent/100)

3. Profit and Loss

Profit % = (Profit / Cost Price) × 100
Loss % = (Loss / Cost Price) × 100
Selling Price = Cost Price × (1 ± %/100)

4. Discount and Marked Price

Discount = Marked Price × (Discount% / 100)
Selling Price = Marked Price – Discount

5. Compound Interest

Amount = P × (1 + r/100)^n

5 Tricks to Solve Problems on Percentage

Some tricks not only help you solve questions but also save a lot of your time. Here are the 5 tricks that will help you deal with percentage problems:

Trick 1: Use simple fractions

Instead of 1%, think 1/100.

Example: 5% of 200 = (5/100) × 200 = 10.

Trick 2: Use the multiplier method

For 15% increase gives multiply by 1.15

For 20% decrease gives multiply by 0.8

Trick 3: Shortcut for continuous changes

Increase 10% then decrease 10%

Net = × 1.1 × 0.9 = × 0.99 gives net loss of 1%

Trick 4: Fast way to find cost from marked price

If cost is Rs. 80 and profit is 25%, then MP = 80 × 1.25 = Rs. 100

Practice It Yourself:

Example 1: Simple percentage-

What is 12.5% of Rs. 240?

12.5% = 1/8 gives 240 ÷ 8 = Rs. 30

Example 2: Percentage increase-

Price was Rs. 600, now 10% higher?

600 × 1.10 = Rs. 660

Example 3: Discount problem-

Marked price = Rs. 1000. Discount = 15%.

Discount = 1000 × 0.15 = Rs. 150

Selling Price = 1000 – 150 = Rs. 850

Example 4: Profit %-

Cost = Rs. 400. Selling Price = Rs. 500.

Profit = 100. Profit% = (100/400) × 100 = 25%

Example 5: Compound interest

P = Rs. 1000, r = 10%, n = 2 years

Amount = 1000 × (1.1)^2 = 1000 × 1.21 = Rs. 1210

Interest earned = Rs. 210

How to Practice the Right Way

When you start, be patient and accurate, and don’t be in a hurry.
Then work on speed. Set a timer to keep an eye on your speed.
Mix types: simple, profit-loss, CI in one set.
Keep a note of mistakes. Review them daily before the exam.

ALSO READ: Word Swap Tricks for RBI Grade B Phase 1 Exam

Daily Mini Task

You need to practice daily to master the tips mentioned above. And for that, you should give yourself some tasks like:

Solve 5 percentage questions.
Include one compound interest problem.
Learn one shortcut from above.
Revise fraction-percent conversions.

If you’ll just include these mini-tasks in your study plan (in the Quantitative Aptitude section), continuously for 10 days, you’ll surely master the art of solving percentage questions.

Disclaimer: The percentage questions, solutions, and preparation tips provided here are intended solely for practice and learning purposes. They are based on exam trends and expert analysis, not official RBI content. While these materials aim to strengthen your preparation, they do not guarantee reflection in the actual RBI Grade B exam. Candidates should always refer to the official RBI notifications and syllabus for authoritative information.

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FAQs

Q1. What is a percentage?

It’s a number expressed as parts of 100. For example, 50% means half.

Q2. How do I find a percentage?

Multiply the number by the percentage and divide by 100.

Q3. How do I increase a number by a percentage?

Find the percentage value, then add it to the original number.

Q4. How do I decrease a number by a percentage?

Find the percentage value, then subtract it from the original number.

Asad Yar Khan

Asad specializes in penning and overseeing blogs on study strategies, exam techniques, and key strategies for SSC, banking, regulatory body, engineering, and other competitive exams. During his 3+ years' stint at PracticeMock, he has helped thousands of aspirants gain the confidence to achieve top results. In his free time, he either transforms into a sleep lover, devours books, or becomes an outdoor enthusiast.