-78.32% is the change from 143 to 31
Calculation steps:
[( 31 - 143 ) ÷ 143] x 100 = -78.32%
Formula
Percentage change = [(31 - 143) / 143] x 100
Subtract the new number by the original number
31 - 143 = -112
-112 ÷ 143 = -0.7832167832167832
-0.7832167832167832 x 100 = -78.32%