1254.9% is the change from 51 to 691
Calculation steps:
[( 691 - 51 ) ÷ 51] x 100 = 1254.9%
Formula
Percentage change = [(691 - 51) / 51] x 100
Subtract the new number by the original number
691 - 51 = 640
640 ÷ 51 = 12.549019607843137
12.549019607843137 x 100 = 1254.9%