-63.99% is the change from 336 to 121
Calculation steps:
[( 121 - 336 ) ÷ 336] x 100 = -63.99%
Formula
Percentage change = [(121 - 336) / 336] x 100
Subtract the new number by the original number
121 - 336 = -215
-215 ÷ 336 = -0.6398809523809523
-0.6398809523809523 x 100 = -63.99%