-64.09% is the change from 220 to 79
Calculation steps:
[( 79 - 220 ) ÷ 220] x 100 = -64.09%
Formula
Percentage change = [(79 - 220) / 220] x 100
Subtract the new number by the original number
79 - 220 = -141
-141 ÷ 220 = -0.6409090909090909
-0.6409090909090909 x 100 = -64.09%