-60.41% is the change from 836 to 331
Calculation steps:
[( 331 - 836 ) ÷ 836] x 100 = -60.41%
Formula
Percentage change = [(331 - 836) / 836] x 100
Subtract the new number by the original number
331 - 836 = -505
-505 ÷ 836 = -0.604066985645933
-0.604066985645933 x 100 = -60.41%