Anna, Roshel and Harry baked some wafers. Anna and Roshel baked
57 of the wafers. Roshel and Harry baked
25 of the wafers. Anna and Harry baked 589 wafers altogether.
- What fraction of the wafers did Anna and Harry bake altogether?
- How many wafers did the three girls bake in total?
| Anna |
Roshel |
Harry |
Total |
| 5x5 |
2x5 |
7x5 |
| 3x7 |
2x7 |
5x7 |
| 21 u |
4 u |
10 u |
35 u |
(a)
The total number of wafers remains unchanged. Make the total number of wafers the same. LCM of 7 and 5 is 35.
Number of wafers baked by Roshel
= 14 u - 10 u
= 4 u
Number of wafers baked by Anna and Harry
= 21 u + 10 u
= 31 u
Total number of wafers = 35 u
Fraction of the wafers baked by Anna and Harry =
3135(b)
Total number of wafers baked by Anna and Harry = 31 u
31 u = 589
1 u = 589 ÷ 31 = 19
Total number of wafers baked
= 35 u
= 35 x 19
= 665
Answer(s): (a)
3135; (b) 665
