-31.71% is the change from 123 to 84
Calculation steps:
[( 84 - 123 ) ÷ 123] x 100 = -31.71%
Formula
Percentage change = [(84 - 123) / 123] x 100
Subtract the new number by the original number
84 - 123 = -39
-39 ÷ 123 = -0.3170731707317073
-0.3170731707317073 x 100 = -31.71%