84.87% is the change from 390 to 721
Calculation steps:
[( 721 - 390 ) ÷ 390] x 100 = 84.87%
Formula
Percentage change = [(721 - 390) / 390] x 100
Subtract the new number by the original number
721 - 390 = 331
331 ÷ 390 = 0.8487179487179487
0.8487179487179487 x 100 = 84.87%