Question

Calculate each percent increase or percent decreases Round to the nearest whole percent if necessary 1. original amount: 30, new amount: 45 2. original amount: 12, new amount: 16 3. original amount: 17 new amount: 21 4. original amount: 85, new amount: 56 5. original amount: 48, new amount: 37 6. original amount: 124, new amount: PLS HELP ME!!!

Answer 1

The percentage increase is 50%

Here, we want to calculate the percentage increase or decrease

To know if it is a decrease or an increase, we use the following simple logic.

If new amount is greater than original amount, then it is an increase.

If new amout is less than original amount, then it is a decrease

For the first question, we can see that the new amount is greater than the old amount

This indicates an increase

Mathematically;

`\text{percentage increase = }\frac{(new\text{ amount - original amount)}}{\text{old amount}}\text{ }*\text{ 100 percent}`

According to the first question, new amount = 45 while old amount = 30

so;

percentage increase = (45-30)/30 * 100%

= 15/30 * 100% = 100%/2 = 50%