1216.33% is the change from 49 to 645
Calculation steps:
[( 645 - 49 ) ÷ 49] x 100 = 1216.33%
Formula
Percentage change = [(645 - 49) / 49] x 100
Subtract the new number by the original number
645 - 49 = 596
596 ÷ 49 = 12.16326530612245
12.16326530612245 x 100 = 1216.33%