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RRB NTPC Mains or Stage 2 Model Paper 7 with solutions

Question : 9 of 120

Marks: +1, -0

What is the number whose 20% is 30% of 40?

Solution:

Concept:

A percentage comparison can be converted into a simple equation.

Explanation:

Let the required number be

x

Given:

20\%

x = 30\%

40

So,

\frac{20}{100}x = \frac{30}{100} \times 40

Simplify the right side:

\frac{30}{100}\times 40 = 12

Then,

\frac{20}{100}x = 12

Multiply both sides by

5

x = 12 \times 5 = 60

Answer:

The required number is

60

Correct option: C.

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