49.13% is the change from 287 to 428
Calculation steps:
[( 428 - 287 ) ÷ 287] x 100 = 49.13%
Formula
Percentage change = [(428 - 287) / 287] x 100
Subtract the new number by the original number
428 - 287 = 141
141 ÷ 287 = 0.4912891986062718
0.4912891986062718 x 100 = 49.13%