-40.22% is the change from 920 to 550
Calculation steps:
[( 550 - 920 ) ÷ 920] x 100 = -40.22%
Formula
Percentage change = [(550 - 920) / 920] x 100
Subtract the new number by the original number
550 - 920 = -370
-370 ÷ 920 = -0.40217391304347827
-0.40217391304347827 x 100 = -40.22%