-97.66% is the change from 770 to 18
Calculation steps:
[( 18 - 770 ) ÷ 770] x 100 = -97.66%
Formula
Percentage change = [(18 - 770) / 770] x 100
Subtract the new number by the original number
18 - 770 = -752
-752 ÷ 770 = -0.9766233766233766
-0.9766233766233766 x 100 = -97.66%