Archie spent
25 of his allowance on a lego set. He spent
34 of the remaining allowance on a marble.
- What fraction of his allowance was left?
- If he had left $21, how much allowance did Archie have at first?
(a)
Fraction of allowance left after spending on a lego set
= 1 -
25=
35Fraction of remaining allowance left
= 1 -
34=
14Fraction of his allowance left
=
35 x
14=
320(b)
Amount that Archie had at first = 20 u
Amount that Archie had left = 3 u
3 u = 21
1 u = 21 ÷ 3 = 7
Total amount that Archie had at first
= 20 u
= 20 x 7
= $140
Answer(s): (a)
320; (b) $140