Answer-A number is first increased by 10% and then increased by 20%. The number, so obtained, is now decrea...

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Initial number x   After 10 increase1.10x   After 20 increase on new value 1.10x 1.20  1.32x   After a 12 decrease on the latest value 1.32  0.88  1.1616x Net change 1.1616x -x 0.1616x Net increase percentage 0.1616xx 100  16.16 Thus, the net increase in the original number is 16.16.

A number is first increased by 10% and then increased by 20%. The number, so obtained, is now decreased by 12%. What is the net increase or decrease per cent in the original number?

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