Increase and decrease

A number is first increased by 20% and the resulting number is then decreased by 10%. Find the overall change in the number as percent.

Correct answer:

p =  8 %

Step-by-step explanation:

r1=100%+20%=1+10020=1.2 r2=100%10%=110010=0.9  r=r1 r2=1.2 0.9=2527=1.08  p=100 (r1)=100 (1.081)=8%

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