-32.68% is the change from 921 to 620
Calculation steps:
[( 620 - 921 ) ÷ 921] x 100 = -32.68%
Formula
Percentage change = [(620 - 921) / 921] x 100
Subtract the new number by the original number
620 - 921 = -301
-301 ÷ 921 = -0.3268186753528773
-0.3268186753528773 x 100 = -32.68%