270% is the change from 20 to 74
Calculation steps:
[( 74 - 20 ) ÷ 20] x 100 = 270%
Formula
Percentage change = [(74 - 20) / 20] x 100
Subtract the new number by the original number
74 - 20 = 54
54 ÷ 20 = 2.7
2.7 x 100 = 270%
Example