ElectricPavlov

Don't CROSS multiply....just multiply the numerators and multiply the denominators

3/8  x 12/5 =    (3x12)/(8x5)   =  36/40 = 18/20  =  9/10

Use the calculator, Silly !

Just use the calculator on this website. Divide 7 into 3   (or)    3 divided by 7  =  0.4285714285714286

15/5    basically reads  Fifteen Fifths and basically MEANS 15 divided by 5      =   3

4^(-1) = 1/4 = 0.25

The values of sin only range from -1 to 1     48 is not included.

They ARE different, but related    180 degrees = pi radians

I come up with  "A"  4/221 and they are dependent

Well, according to the chart   13 out of 90 want a 86 inch LCD television    13/90 = 14.4%  or 14% rounded

     Though the question asks what percent of the warehouse should be stocked with 86-inch televeisions   ....it doesn't really ask for 'LCD televisions' (even though they are referred as 'on sale')...it only asks for 86 inch televisions which would be 24/90 or 26% (but this is not an answer option.....so I suspect they MEANT to ask about 86 - inch LCD televisions).