80% is the change from 285 to 513
Calculation steps:
[( 513 - 285 ) ÷ 285] x 100 = 80%
Formula
Percentage change = [(513 - 285) / 285] x 100
Subtract the new number by the original number
513 - 285 = 228
228 ÷ 285 = 0.8
0.8 x 100 = 80%
Example