-60.5% is the change from 838 to 331
Calculation steps:
[( 331 - 838 ) ÷ 838] x 100 = -60.5%
Formula
Percentage change = [(331 - 838) / 838] x 100
Subtract the new number by the original number
331 - 838 = -507
-507 ÷ 838 = -0.6050119331742243
-0.6050119331742243 x 100 = -60.5%