-33.84% is the change from 331 to 219
Calculation steps:
[( 219 - 331 ) ÷ 331] x 100 = -33.84%
Formula
Percentage change = [(219 - 331) / 331] x 100
Subtract the new number by the original number
219 - 331 = -112
-112 ÷ 331 = -0.338368580060423
-0.338368580060423 x 100 = -33.84%