77.89% is the change from 285 to 507
Calculation steps:
[( 507 - 285 ) ÷ 285] x 100 = 77.89%
Formula
Percentage change = [(507 - 285) / 285] x 100
Subtract the new number by the original number
507 - 285 = 222
222 ÷ 285 = 0.7789473684210526
0.7789473684210526 x 100 = 77.89%