537.5% is the change from 8 to 51
Calculation steps:
[( 51 - 8 ) ÷ 8] x 100 = 537.5%
Formula
Percentage change = [(51 - 8) / 8] x 100
Subtract the new number by the original number
51 - 8 = 43
43 ÷ 8 = 5.375
5.375 x 100 = 537.5%
Example