Original: 132

New: 150

Since the new amount is greater than the original, this is a percent of increase.

The amount of change = New Amount – Original Amount.

The amount of change = .

Let r be the percentage of increase.

Use the original number, 132 as the base.

The percent proportion is

To solve for r, first find the cross products.

                                  (Multiply: )

                            (Divide each side by 45)

                                        (Cancel common terms)

                                         (Divide: )

The percentage of increase by 13.63%

The percent of change is a percent of increase.

The percentage of increase by 13.63%.