78.3% is the change from 507 to 904
Calculation steps:
[( 904 - 507 ) ÷ 507] x 100 = 78.3%
Formula
Percentage change = [(904 - 507) / 507] x 100
Subtract the new number by the original number
904 - 507 = 397
397 ÷ 507 = 0.7830374753451677
0.7830374753451677 x 100 = 78.3%