-75.29% is the change from 688 to 170
Calculation steps:
[( 170 - 688 ) ÷ 688] x 100 = -75.29%
Formula
Percentage change = [(170 - 688) / 688] x 100
Subtract the new number by the original number
170 - 688 = -518
-518 ÷ 688 = -0.752906976744186
-0.752906976744186 x 100 = -75.29%