-50.41% is the change from 123 to 61
Calculation steps:
[( 61 - 123 ) ÷ 123] x 100 = -50.41%
Formula
Percentage change = [(61 - 123) / 123] x 100
Subtract the new number by the original number
61 - 123 = -62
-62 ÷ 123 = -0.5040650406504065
-0.5040650406504065 x 100 = -50.41%