-74.12% is the change from 657 to 170
Calculation steps:
[( 170 - 657 ) ÷ 657] x 100 = -74.12%
Formula
Percentage change = [(170 - 657) / 657] x 100
Subtract the new number by the original number
170 - 657 = -487
-487 ÷ 657 = -0.741248097412481
-0.741248097412481 x 100 = -74.12%