-77.83% is the change from 221 to 49
Calculation steps:
[( 49 - 221 ) ÷ 221] x 100 = -77.83%
Formula
Percentage change = [(49 - 221) / 221] x 100
Subtract the new number by the original number
49 - 221 = -172
-172 ÷ 221 = -0.7782805429864253
-0.7782805429864253 x 100 = -77.83%