81.5% is the change from 454 to 824
Calculation steps:
[( 824 - 454 ) ÷ 454] x 100 = 81.5%
Formula
Percentage change = [(824 - 454) / 454] x 100
Subtract the new number by the original number
824 - 454 = 370
370 ÷ 454 = 0.8149779735682819
0.8149779735682819 x 100 = 81.5%