88.76% is the change from 445 to 840
Calculation steps:
[( 840 - 445 ) ÷ 445] x 100 = 88.76%
Formula
Percentage change = [(840 - 445) / 445] x 100
Subtract the new number by the original number
840 - 445 = 395
395 ÷ 445 = 0.8876404494382022
0.8876404494382022 x 100 = 88.76%