390.2% is the change from 51 to 250
Calculation steps:
[( 250 - 51 ) ÷ 51] x 100 = 390.2%
Formula
Percentage change = [(250 - 51) / 51] x 100
Subtract the new number by the original number
250 - 51 = 199
199 ÷ 51 = 3.9019607843137254
3.9019607843137254 x 100 = 390.2%