-90.79% is the change from 315 to 29
Calculation steps:
[( 29 - 315 ) ÷ 315] x 100 = -90.79%
Formula
Percentage change = [(29 - 315) / 315] x 100
Subtract the new number by the original number
29 - 315 = -286
-286 ÷ 315 = -0.9079365079365079
-0.9079365079365079 x 100 = -90.79%