78.46% is the change from 506 to 903
Calculation steps:
[( 903 - 506 ) ÷ 506] x 100 = 78.46%
Formula
Percentage change = [(903 - 506) / 506] x 100
Subtract the new number by the original number
903 - 506 = 397
397 ÷ 506 = 0.7845849802371542
0.7845849802371542 x 100 = 78.46%