-75.11% is the change from 687 to 171
Calculation steps:
[( 171 - 687 ) ÷ 687] x 100 = -75.11%
Formula
Percentage change = [(171 - 687) / 687] x 100
Subtract the new number by the original number
171 - 687 = -516
-516 ÷ 687 = -0.7510917030567685
-0.7510917030567685 x 100 = -75.11%