54.3% is the change from 523 to 807
Calculation steps:
[( 807 - 523 ) ÷ 523] x 100 = 54.3%
Formula
Percentage change = [(807 - 523) / 523] x 100
Subtract the new number by the original number
807 - 523 = 284
284 ÷ 523 = 0.5430210325047801
0.5430210325047801 x 100 = 54.3%