84.44% is the change from 45 to 83
Calculation steps:
[( 83 - 45 ) ÷ 45] x 100 = 84.44%
Formula
Percentage change = [(83 - 45) / 45] x 100
Subtract the new number by the original number
83 - 45 = 38
38 ÷ 45 = 0.8444444444444444
0.8444444444444444 x 100 = 84.44%