83.15% is the change from 445 to 815
Calculation steps:
[( 815 - 445 ) ÷ 445] x 100 = 83.15%
Formula
Percentage change = [(815 - 445) / 445] x 100
Subtract the new number by the original number
815 - 445 = 370
370 ÷ 445 = 0.8314606741573034
0.8314606741573034 x 100 = 83.15%