862.75% is the change from 51 to 491
Calculation steps:
[( 491 - 51 ) ÷ 51] x 100 = 862.75%
Formula
Percentage change = [(491 - 51) / 51] x 100
Subtract the new number by the original number
491 - 51 = 440
440 ÷ 51 = 8.627450980392156
8.627450980392156 x 100 = 862.75%