664.44% is the change from 45 to 344
Calculation steps:
[( 344 - 45 ) ÷ 45] x 100 = 664.44%
Formula
Percentage change = [(344 - 45) / 45] x 100
Subtract the new number by the original number
344 - 45 = 299
299 ÷ 45 = 6.644444444444445
6.644444444444445 x 100 = 664.44%