150.51% is the change from 390 to 977
Calculation steps:
[( 977 - 390 ) ÷ 390] x 100 = 150.51%
Formula
Percentage change = [(977 - 390) / 390] x 100
Subtract the new number by the original number
977 - 390 = 587
587 ÷ 390 = 1.505128205128205
1.505128205128205 x 100 = 150.51%