81.42% is the change from 452 to 820
Calculation steps:
[( 820 - 452 ) ÷ 452] x 100 = 81.42%
Formula
Percentage change = [(820 - 452) / 452] x 100
Subtract the new number by the original number
820 - 452 = 368
368 ÷ 452 = 0.8141592920353983
0.8141592920353983 x 100 = 81.42%