115% is the change from 20 to 43
Calculation steps:
[( 43 - 20 ) ÷ 20] x 100 = 115%
Formula
Percentage change = [(43 - 20) / 20] x 100
Subtract the new number by the original number
43 - 20 = 23
23 ÷ 20 = 1.15
1.15 x 100 = 115%
Example