-22.08% is the change from 770 to 600
Calculation steps:
[( 600 - 770 ) ÷ 770] x 100 = -22.08%
Formula
Percentage change = [(600 - 770) / 770] x 100
Subtract the new number by the original number
600 - 770 = -170
-170 ÷ 770 = -0.22077922077922077
-0.22077922077922077 x 100 = -22.08%