611.11% is the change from 45 to 320
Calculation steps:
[( 320 - 45 ) ÷ 45] x 100 = 611.11%
Formula
Percentage change = [(320 - 45) / 45] x 100
Subtract the new number by the original number
320 - 45 = 275
275 ÷ 45 = 6.111111111111111
6.111111111111111 x 100 = 611.11%