91.01% is the change from 445 to 850
Calculation steps:
[( 850 - 445 ) ÷ 445] x 100 = 91.01%
Formula
Percentage change = [(850 - 445) / 445] x 100
Subtract the new number by the original number
850 - 445 = 405
405 ÷ 445 = 0.9101123595505618
0.9101123595505618 x 100 = 91.01%