Question

16. A number is increased by 30% and then it is decreased by 30%. Find the net increase or decrease per cent.​

Answer 1

Step-by-step explanation:

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Answer 2

30%=30/100=3/10

30% decreased of a number means if the number is 10 ,then it will be 7.

30% increase of a number means if the number is 10 then it will be 13.

Further 30% decreased of means if the number is 10 then it will be 7.

Then, 10×10×10=1000 will be 7×13×7=637.

So, out of 1000 total decrease (1000 - 637)=363

Then, out of 1000/10=100 total decrease 363/10=36.3

Finally, Net decreased percentage in the number is 36.3%
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