1245.1% is the change from 51 to 686
Calculation steps:
[( 686 - 51 ) ÷ 51] x 100 = 1245.1%
Formula
Percentage change = [(686 - 51) / 51] x 100
Subtract the new number by the original number
686 - 51 = 635
635 ÷ 51 = 12.450980392156863
12.450980392156863 x 100 = 1245.1%