83.11% is the change from 450 to 824
Calculation steps:
[( 824 - 450 ) ÷ 450] x 100 = 83.11%
Formula
Percentage change = [(824 - 450) / 450] x 100
Subtract the new number by the original number
824 - 450 = 374
374 ÷ 450 = 0.8311111111111111
0.8311111111111111 x 100 = 83.11%