Percentage Formula: 1) If a number is increased by 10%10% and then again increased by 20%,20%,net change =(10+20+10×20100)=32%=(10+20+10×20100)=32%i.e., there is a net increase of 32%32% Percentage Formula WBCS & WBP (2) If a number is decreased by 10%10% and then again decreased by 20%,20%,net change =(−10−20+10×20100)=−28%=(−10−20+10×20100)=−28%i.e., there is a ...
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