-78.97% is the change from 428 to 90
Calculation steps:
[( 90 - 428 ) ÷ 428] x 100 = -78.97%
Formula
Percentage change = [(90 - 428) / 428] x 100
Subtract the new number by the original number
90 - 428 = -338
-338 ÷ 428 = -0.7897196261682243
-0.7897196261682243 x 100 = -78.97%