-34.85% is the change from 66 to 43
Calculation steps:
[( 43 - 66 ) ÷ 66] x 100 = -34.85%
Formula
Percentage change = [(43 - 66) / 66] x 100
Subtract the new number by the original number
43 - 66 = -23
-23 ÷ 66 = -0.3484848484848485
-0.3484848484848485 x 100 = -34.85%