-70.54% is the change from 336 to 99
Calculation steps:
[( 99 - 336 ) ÷ 336] x 100 = -70.54%
Formula
Percentage change = [(99 - 336) / 336] x 100
Subtract the new number by the original number
99 - 336 = -237
-237 ÷ 336 = -0.7053571428571429
-0.7053571428571429 x 100 = -70.54%