-19.58% is the change from 143 to 115
Calculation steps:
[( 115 - 143 ) ÷ 143] x 100 = -19.58%
Formula
Percentage change = [(115 - 143) / 143] x 100
Subtract the new number by the original number
115 - 143 = -28
-28 ÷ 143 = -0.1958041958041958
-0.1958041958041958 x 100 = -19.58%