-90% is the change from 920 to 92
Calculation steps:
[( 92 - 920 ) ÷ 920] x 100 = -90%
Formula
Percentage change = [(92 - 920) / 920] x 100
Subtract the new number by the original number
92 - 920 = -828
-828 ÷ 920 = -0.9
-0.9 x 100 = -90%
Example