1164.71% is the change from 51 to 645
Calculation steps:
[( 645 - 51 ) ÷ 51] x 100 = 1164.71%
Formula
Percentage change = [(645 - 51) / 51] x 100
Subtract the new number by the original number
645 - 51 = 594
594 ÷ 51 = 11.647058823529411
11.647058823529411 x 100 = 1164.71%