81.8% is the change from 445 to 809
Calculation steps:
[( 809 - 445 ) ÷ 445] x 100 = 81.8%
Formula
Percentage change = [(809 - 445) / 445] x 100
Subtract the new number by the original number
809 - 445 = 364
364 ÷ 445 = 0.8179775280898877
0.8179775280898877 x 100 = 81.8%