79.44% is the change from 287 to 515
Calculation steps:
[( 515 - 287 ) ÷ 287] x 100 = 79.44%
Formula
Percentage change = [(515 - 287) / 287] x 100
Subtract the new number by the original number
515 - 287 = 228
228 ÷ 287 = 0.794425087108014
0.794425087108014 x 100 = 79.44%