-48.23% is the change from 311 to 161
Calculation steps:
[( 161 - 311 ) ÷ 311] x 100 = -48.23%
Formula
Percentage change = [(161 - 311) / 311] x 100
Subtract the new number by the original number
161 - 311 = -150
-150 ÷ 311 = -0.48231511254019294
-0.48231511254019294 x 100 = -48.23%