275% is the change from 20 to 75
Calculation steps:
[( 75 - 20 ) ÷ 20] x 100 = 275%
Formula
Percentage change = [(75 - 20) / 20] x 100
Subtract the new number by the original number
75 - 20 = 55
55 ÷ 20 = 2.75
2.75 x 100 = 275%
Example