Original: 200

New: 172

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, 200 as the base.

The percent proportion is

To solve for r, first find the cross products.

Divide each side by 200.

The percentage of decrease by 14%.

The percent of change is a percent of decrease. The percentage of decrease by 14%.