50.7% is the change from 286 to 431
Calculation steps:
[( 431 - 286 ) ÷ 286] x 100 = 50.7%
Formula
Percentage change = [(431 - 286) / 286] x 100
Subtract the new number by the original number
431 - 286 = 145
145 ÷ 286 = 0.506993006993007
0.506993006993007 x 100 = 50.7%