Question

A number is increased by 20% and then it is decreased by 10%. Find the net increase or decrease per cent.​

Answer 1

Answer:

1

Primary School Math 5 points

A number is first increased by 20% and then decreased by 15%. find the net increase or decrease percent

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Answers

Let the number to be 100

Number Increase by 20%

100 + 20% of 100

= 100 + ( (20/100)×100 )

= 100 + 20 = 120

The resulting number decreased by its 15%

= 120- (15/100×120)

= 120 - 18

= 102

Now, net increase =102-100 = 2

Increase % = (net increase / Original number × 100) %

= ( 2 / 100 ×100 )%

= 2%.

Hence, the increase percent = 2%