396.77% is the change from 155 to 770
Calculation steps:
[( 770 - 155 ) ÷ 155] x 100 = 396.77%
Formula
Percentage change = [(770 - 155) / 155] x 100
Subtract the new number by the original number
770 - 155 = 615
615 ÷ 155 = 3.967741935483871
3.967741935483871 x 100 = 396.77%