420% is the change from 150 to 780
Calculation steps:
[( 780 - 150 ) ÷ 150] x 100 = 420%
Formula
Percentage change = [(780 - 150) / 150] x 100
Subtract the new number by the original number
780 - 150 = 630
630 ÷ 150 = 4.2
4.2 x 100 = 420%
Example