340% is the change from 50 to 220
Calculation steps:
[( 220 - 50 ) ÷ 50] x 100 = 340%
Formula
Percentage change = [(220 - 50) / 50] x 100
Subtract the new number by the original number
220 - 50 = 170
170 ÷ 50 = 3.4
3.4 x 100 = 340%
Example