-31.52% is the change from 920 to 630
Calculation steps:
[( 630 - 920 ) ÷ 920] x 100 = -31.52%
Formula
Percentage change = [(630 - 920) / 920] x 100
Subtract the new number by the original number
630 - 920 = -290
-290 ÷ 920 = -0.31521739130434784
-0.31521739130434784 x 100 = -31.52%