-50.79% is the change from 63 to 31
Calculation steps:
[( 31 - 63 ) ÷ 63] x 100 = -50.79%
Formula
Percentage change = [(31 - 63) / 63] x 100
Subtract the new number by the original number
31 - 63 = -32
-32 ÷ 63 = -0.5079365079365079
-0.5079365079365079 x 100 = -50.79%