149.87% is the change from 391 to 977
Calculation steps:
[( 977 - 391 ) ÷ 391] x 100 = 149.87%
Formula
Percentage change = [(977 - 391) / 391] x 100
Subtract the new number by the original number
977 - 391 = 586
586 ÷ 391 = 1.4987212276214834
1.4987212276214834 x 100 = 149.87%