Each one of four pies were cut into 8 pieces for dinner. After dinner there remained 1/2 of a pie, % of a pie, 3/8 of a pie and 5/8 of a pie. How many pieces of pies were left?

Step-by-step explanation:

You have 3/5 of an apple pie"  means you have 3 pieces of the 5-piece pie

  "You divide the remaining pie into 5 equal slices."     means

         (3/5 pie) / 5

The math:

       (3/5 pie) / 5

  is also

       (3/5 pie) * (1/5)          [to divide by fraction 5/1, invert to 1/5 and multiply]

  is also (1/5) * (3/5 pie)

      [This means 1/5 of the 3/5 of a pie that is left of"]

So,

     each slice is (1/5)*(3/5) pie = 3/25 pie      [multiply numerators and denominators]

These ones always feel weird.  But we will read the problem directly and do what it says.

So it is 3/5 divided by 5.

Or 3/5/5.

But that looks really weird, so lets think of it like multiplying by 1/5 instead (which is the same as dividing by 5)

So, (3/5) * (1/5) which equals 3/25.  

Everyone gets 3 twenty fifths of a pie.

ok

step-by-step explanation:

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540