850.98% is the change from 51 to 485
Calculation steps:
[( 485 - 51 ) ÷ 51] x 100 = 850.98%
Formula
Percentage change = [(485 - 51) / 51] x 100
Subtract the new number by the original number
485 - 51 = 434
434 ÷ 51 = 8.509803921568627
8.509803921568627 x 100 = 850.98%