128.21% is the change from 390 to 890
Calculation steps:
[( 890 - 390 ) ÷ 390] x 100 = 128.21%
Formula
Percentage change = [(890 - 390) / 390] x 100
Subtract the new number by the original number
890 - 390 = 500
500 ÷ 390 = 1.2820512820512822
1.2820512820512822 x 100 = 128.21%