Opal had 4 times as much money as Bobby. After Opal spent
12 of her money and Bobby spent
35 of his money, they had a total of $1608 left.
- How much money did Opal and Bobby have altogether at first?
- Bobby spent 25 of his remaining money on a skirt. What fraction of his original amount of money did he spend on the skirt?
| |
Opal |
Bobby |
Total |
| Before |
4 u |
1 u |
|
| Change |
- 2 u |
- 0.6 u |
|
| After |
2 u |
0.4 u |
$1608 |
(a)
Amount that Opal spent
=
12 x 4 u
= 2 u
Amount that Bobby spent
=
35 x 1 u
= 0.6 u
Amount that Opal and Bobby spent
= 2 u + 0.6 u
= 2.4 u
2.4 u = 1608
1 u = 1608 ÷ 2.4 = 670
Amount that Opal and Bobby had altogether at first
= 4 u + 1 u
= 5 u
= 5 x 670
= $3350
(b)
Amount that Bobby spent on the skirt
=
25 x 0.4 u
= 0.16 u
Fraction of Bobby's original amount that he spent on a skirt
=
0.161 =
0.16 x 1001 x 100=
16100=
425 Answer(s): (a) $3350; (b)
425 
