150% is the change from 390 to 975
Calculation steps:
[( 975 - 390 ) ÷ 390] x 100 = 150%
Formula
Percentage change = [(975 - 390) / 390] x 100
Subtract the new number by the original number
975 - 390 = 585
585 ÷ 390 = 1.5
1.5 x 100 = 150%
Example