498.04% is the change from 51 to 305
Calculation steps:
[( 305 - 51 ) ÷ 51] x 100 = 498.04%
Formula
Percentage change = [(305 - 51) / 51] x 100
Subtract the new number by the original number
305 - 51 = 254
254 ÷ 51 = 4.980392156862745
4.980392156862745 x 100 = 498.04%