39.86% is the change from 286 to 400
Calculation steps:
[( 400 - 286 ) ÷ 286] x 100 = 39.86%
Formula
Percentage change = [(400 - 286) / 286] x 100
Subtract the new number by the original number
400 - 286 = 114
114 ÷ 286 = 0.3986013986013986
0.3986013986013986 x 100 = 39.86%