-48.45% is the change from 161 to 83
Calculation steps:
[( 83 - 161 ) ÷ 161] x 100 = -48.45%
Formula
Percentage change = [(83 - 161) / 161] x 100
Subtract the new number by the original number
83 - 161 = -78
-78 ÷ 161 = -0.484472049689441
-0.484472049689441 x 100 = -48.45%