-77.73% is the change from 220 to 49
Calculation steps:
[( 49 - 220 ) ÷ 220] x 100 = -77.73%
Formula
Percentage change = [(49 - 220) / 220] x 100
Subtract the new number by the original number
49 - 220 = -171
-171 ÷ 220 = -0.7772727272727272
-0.7772727272727272 x 100 = -77.73%