85.84% is the change from 452 to 840
Calculation steps:
[( 840 - 452 ) ÷ 452] x 100 = 85.84%
Formula
Percentage change = [(840 - 452) / 452] x 100
Subtract the new number by the original number
840 - 452 = 388
388 ÷ 452 = 0.8584070796460177
0.8584070796460177 x 100 = 85.84%