670% is the change from 80 to 616
Calculation steps:
[( 616 - 80 ) ÷ 80] x 100 = 670%
Formula
Percentage change = [(616 - 80) / 80] x 100
Subtract the new number by the original number
616 - 80 = 536
536 ÷ 80 = 6.7
6.7 x 100 = 670%
Example