90% is the change from 270 to 513
Calculation steps:
[( 513 - 270 ) ÷ 270] x 100 = 90%
Formula
Percentage change = [(513 - 270) / 270] x 100
Subtract the new number by the original number
513 - 270 = 243
243 ÷ 270 = 0.9
0.9 x 100 = 90%
Example