Chapter 8 · Class 8 CBSE · Formula Sheet

Comparing Quantities Formulas — Class 8 CBSE

Calculate percentages, profit, loss, discount, tax, and compound interest.

Key Formulas

Simple Interest

\text{SI} = \dfrac{P \times R \times T}{100}

Compound Interest

A = P\left(1 + \dfrac{R}{100}\right)^n

CI Formula

\text{CI} = A - P = P\left[\left(1 + \dfrac{R}{100}\right)^n - 1\right]

Discount

\text{Discount} = \text{Marked Price} - \text{Selling Price}

Discount %

\text{Discount \%} = \dfrac{\text{Discount}}{\text{MP}} \times 100

Sales Tax

\text{Tax} = \dfrac{\text{Tax Rate}}{100} \times \text{Price}

Worked Examples

1Using: Application

Apply the key formula from this topic to a sample problem.

Step 1: Identify the formula.

Step 2: Substitute the values.

Step 3: Simplify to get the answer.

Answer: See solution above

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More Class 8 CBSE Formulas

Squares, Cubes & Their RootsExponents & PowersRational NumbersQuadrilateralsNumber Patterns & PuzzlesAlgebraic Expressions & Identities

Frequently Asked Questions

How many formulas are in Class 8 CBSE Comparing Quantities?+
There are 6 formulas in the Comparing Quantities chapter for Class 8 CBSE. Each formula is essential for solving problems in this topic.
How to remember Comparing Quantities formulas easily?+
Practice regularly with worked examples, group related formulas together, and use SparkEd's interactive practice mode to reinforce your memory through problem-solving.
Are these Comparing Quantities formulas enough for exams?+
Yes, these formulas cover the complete CBSE Class 8 syllabus for Comparing Quantities. Practice applying them to different types of questions for full exam readiness.

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