-51.45% is the change from 311 to 151
Calculation steps:
[( 151 - 311 ) ÷ 311] x 100 = -51.45%
Formula
Percentage change = [(151 - 311) / 311] x 100
Subtract the new number by the original number
151 - 311 = -160
-160 ÷ 311 = -0.5144694533762058
-0.5144694533762058 x 100 = -51.45%