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Percentage Increase and Decrease

Percentage Increase

Increase $500$ by $20\%$.

Method 1
Step 1: $20\%$ of $500$ is
Step 2: 'Increase' means to this value to $500$.
Therefore, the new amount is .

Method 2
Step 1: 'Increase' by $20\%$ means to $20\%$ to $100\%$, which is $\%$.
Step 2: Therefore, the new amount is $120\%$ of $500$ which is .

Increase $200$ by $15\%$.

Method 1
Step 1: $15\%$ of $200$ is
Step 2: 'Increase' means to this value to $200$.
Therefore, the new amount is .

Method 2
Step 1: 'Increase' by $15\%$ means to $15\%$ to $100\%$, which is $\%$.
Step 2: Therefore, the new amount is $115\%$ of $200$ which is .

Percentage Decrease

Decrease $500$ by $20\%$.

Method 1
Step 1: $20\%$ of $500$ is
Step 2: 'Decrease' means to this value from $500$.
Therefore, the new amount is .

Method 2
Step 1: 'Decrease' by $20\%$ means to $20\%$ from $100\%$, which is $\%$.
Step 2: Therefore, the new amount is $80\%$ of $500$ which is .

Decrease $200$ by $15\%$.

Method 1
Step 1: $15\%$ of $200$ is
Step 2: 'Decrease' means to this value from $200$.
Therefore, the new amount is .

Method 2
Step 1: 'Decrease' by $15\%$ means to $15\%$ from $100\%$, which is $\%$.
Step 2: Therefore, the new amount is $85\%$ of $200$ which is .
Use either method to:

Increase $54$ by $50\%$

Decrease $54$ by $50\%$

Increase $240$ by $25\%$

Decrease $240$ by $25\%$

Increase $660$ by $10\%$

Decrease $660$ by $10\%$

Increase $50$ by $30\%$

Decrease $50$ by $30\%$