-74.07% is the change from 27 to 7
Calculation steps:
[( 7 - 27 ) ÷ 27] x 100 = -74.07%
Formula
Percentage change = [(7 - 27) / 27] x 100
Subtract the new number by the original number
7 - 27 = -20
-20 ÷ 27 = -0.7407407407407407
-0.7407407407407407 x 100 = -74.07%