99.3% is the change from 427 to 851
Calculation steps:
[( 851 - 427 ) ÷ 427] x 100 = 99.3%
Formula
Percentage change = [(851 - 427) / 427] x 100
Subtract the new number by the original number
851 - 427 = 424
424 ÷ 427 = 0.9929742388758782
0.9929742388758782 x 100 = 99.3%