87.44% is the change from 390 to 731
Calculation steps:
[( 731 - 390 ) ÷ 390] x 100 = 87.44%
Formula
Percentage change = [(731 - 390) / 390] x 100
Subtract the new number by the original number
731 - 390 = 341
341 ÷ 390 = 0.8743589743589744
0.8743589743589744 x 100 = 87.44%