-29.89% is the change from 920 to 645
Calculation steps:
[( 645 - 920 ) ÷ 920] x 100 = -29.89%
Formula
Percentage change = [(645 - 920) / 920] x 100
Subtract the new number by the original number
645 - 920 = -275
-275 ÷ 920 = -0.29891304347826086
-0.29891304347826086 x 100 = -29.89%