Four times a number is a _________ % increase in the number

Solution:

Let the number be = x

Four times this number = 4x

4x is greater than x by:

4x - x = 3x

Hence the % increase in the number is

(3x/x) × 100

= 300%

✦ Try this: Five times a number is a _________ % increase in the number.

Let the number be = x

Five times this number = 5x

5x is greater than x by:

5x - x = 4x

Hence the % increase in the number is

(4x/x) × 100

= 400%

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

NCERT Exemplar Class 8 Maths Chapter 9 Problem 44

Four times a number is a _________ % increase in the number

Summary:

Four times a number is a 300 % increase in the number

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