-76.62% is the change from 770 to 180
Calculation steps:
[( 180 - 770 ) ÷ 770] x 100 = -76.62%
Formula
Percentage change = [(180 - 770) / 770] x 100
Subtract the new number by the original number
180 - 770 = -590
-590 ÷ 770 = -0.7662337662337663
-0.7662337662337663 x 100 = -76.62%