SOLUTION: A student spent 1/5 of her pocket money on snacks, 1/4 on transport and 1/8 on club fees. What fraction of her pocket change was left? 1/5 + 1/4 + 1/8 = 23/40 Do not know whe

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Question 129417: A student spent 1/5 of her pocket money on snacks, 1/4 on transport and 1/8 on club fees. What fraction of her pocket change was left?
1/5 + 1/4 + 1/8 = 23/40
Do not know where to go from here.

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Think about her money like a pie.
She starts with a whole pie.
She gave 1/5 of the pie for snacks.
She gave 1/4 of the pie for transport.
She gave 1/8 of the pie for club fees.
You're correct she gave away 23/40.
How much pie did she start with? 1.
If she gave away 23/40, the remainder (what's left) is the difference between the two,
R=1-23%2F40
R=40%2F40-23%2F40
R=%2840-23%29%2F40
R=17%2F40