-70.24% is the change from 336 to 100
Calculation steps:
[( 100 - 336 ) ÷ 336] x 100 = -70.24%
Formula
Percentage change = [(100 - 336) / 336] x 100
Subtract the new number by the original number
100 - 336 = -236
-236 ÷ 336 = -0.7023809523809523
-0.7023809523809523 x 100 = -70.24%