-36.01% is the change from 336 to 215
Calculation steps:
[( 215 - 336 ) ÷ 336] x 100 = -36.01%
Formula
Percentage change = [(215 - 336) / 336] x 100
Subtract the new number by the original number
215 - 336 = -121
-121 ÷ 336 = -0.3601190476190476
-0.3601190476190476 x 100 = -36.01%