Adam has some money.
Adam spends $390 on some marbles and
20% of the remainder on some stickers.
In the end, he has
710 of the total amount left.
- How much does Adam have at first?
- How much more does Adam spend on stickers than on marbles?
Marbles |
Remainder |
$390 |
Stickers |
Left |
|
1 x 7 |
4 x 7 |
3 x 4 |
7 x 4 |
5 u |
7 u |
28 u |
(a)
20% =
20100 =
15 Remainder
Total : Spent : Left
5 : 1 : 5 - 1
5 : 1 : 4
45 of the remaining amount is the same as
710 of the total amount.
Amount that Adam has at first = 10 u
Amount that Adam spends on the marbles
= 12 u - 7 u
= 5 u
5 u = 390
1 u = 390 ÷ 5 = 78
Amount that Adam has at first
= 10 u
= 10 x 78
= $780
(b)
Amount that Adam spends on stickers
= 7 u
= 7 x 78
= $546
Amount that Adam spends more on stickers than on marbles
= 546 - 390
= $156
Answer(s): (a) $780; (b) $156