-48.87% is the change from 311 to 159
Calculation steps:
[( 159 - 311 ) ÷ 311] x 100 = -48.87%
Formula
Percentage change = [(159 - 311) / 311] x 100
Subtract the new number by the original number
159 - 311 = -152
-152 ÷ 311 = -0.4887459807073955
-0.4887459807073955 x 100 = -48.87%