225.76% is the change from 198 to 645
Calculation steps:
[( 645 - 198 ) ÷ 198] x 100 = 225.76%
Formula
Percentage change = [(645 - 198) / 198] x 100
Subtract the new number by the original number
645 - 198 = 447
447 ÷ 198 = 2.257575757575758
2.257575757575758 x 100 = 225.76%