84.28% is the change from 509 to 938
Calculation steps:
[( 938 - 509 ) ÷ 509] x 100 = 84.28%
Formula
Percentage change = [(938 - 509) / 509] x 100
Subtract the new number by the original number
938 - 509 = 429
429 ÷ 509 = 0.8428290766208252
0.8428290766208252 x 100 = 84.28%