55.56% is the change from 45 to 70
Calculation steps:
[( 70 - 45 ) ÷ 45] x 100 = 55.56%
Formula
Percentage change = [(70 - 45) / 45] x 100
Subtract the new number by the original number
70 - 45 = 25
25 ÷ 45 = 0.5555555555555556
0.5555555555555556 x 100 = 55.56%