1154.9% is the change from 51 to 640
Calculation steps:
[( 640 - 51 ) ÷ 51] x 100 = 1154.9%
Formula
Percentage change = [(640 - 51) / 51] x 100
Subtract the new number by the original number
640 - 51 = 589
589 ÷ 51 = 11.549019607843137
11.549019607843137 x 100 = 1154.9%