If a number is increased from $80$ to $100$, the percentage increase is
If a number is increased from $80$ to $100$, the percentage increase is
- $20\%$
- $25\%$
- $30\%$
- $80\%$
Solution
Increase $= 100 - 80 = 20$. Percent increase $= \dfrac{20}{80} \times 100\% = 25\%$ (always taken on the original value).
Asked in: IMO
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