280% is the change from 220 to 836
Calculation steps:
[( 836 - 220 ) ÷ 220] x 100 = 280%
Formula
Percentage change = [(836 - 220) / 220] x 100
Subtract the new number by the original number
836 - 220 = 616
616 ÷ 220 = 2.8
2.8 x 100 = 280%
Example