-21.3% is the change from 831 to 654
Calculation steps:
[( 654 - 831 ) ÷ 831] x 100 = -21.3%
Formula
Percentage change = [(654 - 831) / 831] x 100
Subtract the new number by the original number
654 - 831 = -177
-177 ÷ 831 = -0.21299638989169675
-0.21299638989169675 x 100 = -21.3%