If 7/3% of a number is 42, then the number is
(a) 9800
(b) 8
(c) 1800
(d) 180

Solution:

Let the number be x

7/3 percent of x is expressed as

[(7/3) × (1/100)] × (x)

= 7x/300

It is given that 7/3 % of a number is 42, therefore we can state that,

7x/300 = 42

x = (42 × 300)/(7)

= (42/7) × (300)

= 6 × 300

= 1800

✦ Try this: Find the number, 7% of which is 56.

Assuming the number to be x

We can write:

(7/100)(x) = 56

7x/100 = 56

x = (56/7) × 100

= 800

The number 7% of which will be 56 is 800.

☛ Also Check: NCERT Solutions for Class 8 Maths Chapter 8

NCERT Exemplar Class 8 Maths Chapter 9 Sample Problem 2

If 7/3% of a number is 42, then the number is (a) 9800, (b) 8, (c) 1800, (d) 180

Summary:

If 7/3% of a number is 42, then the number is 1800

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