130.77% is the change from 390 to 900
Calculation steps:
[( 900 - 390 ) ÷ 390] x 100 = 130.77%
Formula
Percentage change = [(900 - 390) / 390] x 100
Subtract the new number by the original number
900 - 390 = 510
510 ÷ 390 = 1.3076923076923077
1.3076923076923077 x 100 = 130.77%