Question

8f the difference between 75% of a number and 60% of the same number is 82.5,then find 20% of the number.

Answer 1

20% of the number is 110

Step-by-step explanation:

Let the number is y.

Then,

75% of y is equal to 0.75y

And 60% of y is 0.60y

Now, it has been given that the difference between 75% of a number and 60% of the same number is 82.5. Thus, we have the equation

0.75 y - 0.60 y = 82.5

0.15 y = 82.5

Divide both sides by 0.15

y = 550.

Therefore, the number is 550.

Hence, 20% of this number is

20% of 550

= 0.20 × 550

= 110

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The income of a person is increased by 10% and then decreased by 10% . Find the change in his income

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