Question
Find the percentage change, when a number is changed from : $ 80$ to $100$
✓
Answer
Original number $=80$
New Number $=100,$
Change
$ =(100-80)$
$ =20$
$ \therefore$ Percentage change $($increase$)$
$ =\frac{20}{80} \times 100$
$ =25 \%$
New Number $=100,$
Change
$ =(100-80)$
$ =20$
$ \therefore$ Percentage change $($increase$)$
$ =\frac{20}{80} \times 100$
$ =25 \%$
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