51.11% is the change from 45 to 68
Calculation steps:
[( 68 - 45 ) ÷ 45] x 100 = 51.11%
Formula
Percentage change = [(68 - 45) / 45] x 100
Subtract the new number by the original number
68 - 45 = 23
23 ÷ 45 = 0.5111111111111111
0.5111111111111111 x 100 = 51.11%