Question

1. If 9% of a number is 99, find the number.
2. express the following ratio rupees 250 to rupees 400 to the simplest form.

Please do it.
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Answer 1

Given - 1. 9% of a number is 99

2. Ratio of rupees 250 to 400

Find - 1. Number

2. Simplest form of ratio

Solution - 1. Expressing the given information in question in mathematical form, to find the number.

9%*number = 99

9/100*number = 99

Number = 99*100/9

Number = 1100

2. Expressing the ratio in mathematical form and solving it to find its simplest form.

Ratio = 250/400

Dividing both numerator and denominator by 25

Ratio = 10/16

Further dividing both numerator and denominator by 2

Ratio = 5/8

Therefore, the number is 1100 and the simplest form of ratio is 5:8.