890.2% is the change from 51 to 505
Calculation steps:
[( 505 - 51 ) ÷ 51] x 100 = 890.2%
Formula
Percentage change = [(505 - 51) / 51] x 100
Subtract the new number by the original number
505 - 51 = 454
454 ÷ 51 = 8.901960784313726
8.901960784313726 x 100 = 890.2%