1213.73% is the change from 51 to 670
Calculation steps:
[( 670 - 51 ) ÷ 51] x 100 = 1213.73%
Formula
Percentage change = [(670 - 51) / 51] x 100
Subtract the new number by the original number
670 - 51 = 619
619 ÷ 51 = 12.137254901960784
12.137254901960784 x 100 = 1213.73%