-59.09% is the change from 66 to 27
Calculation steps:
[( 27 - 66 ) ÷ 66] x 100 = -59.09%
Formula
Percentage change = [(27 - 66) / 66] x 100
Subtract the new number by the original number
27 - 66 = -39
-39 ÷ 66 = -0.5909090909090909
-0.5909090909090909 x 100 = -59.09%