-31.98% is the change from 913 to 621
Calculation steps:
[( 621 - 913 ) ÷ 913] x 100 = -31.98%
Formula
Percentage change = [(621 - 913) / 913] x 100
Subtract the new number by the original number
621 - 913 = -292
-292 ÷ 913 = -0.3198247535596933
-0.3198247535596933 x 100 = -31.98%