-31.08% is the change from 901 to 621
Calculation steps:
[( 621 - 901 ) ÷ 901] x 100 = -31.08%
Formula
Percentage change = [(621 - 901) / 901] x 100
Subtract the new number by the original number
621 - 901 = -280
-280 ÷ 901 = -0.31076581576026635
-0.31076581576026635 x 100 = -31.08%