PSLE A bag contains erasers of three different colours.
12 of the erasers are red. The ratio of the number of purple erasers to that of yellow erasers is 1 : 7. What is the ratio of the number of purple erasers to that of red erasers?
Red |
Purple |
Yellow |
Total |
1x8 |
1x8 |
2x8 |
|
1x1 |
7x1 |
|
8 u |
1 u |
7 u |
16 u |
The total number of yellow and purple erasers is the combined repeated identity.
Make the total number yellow and purple erasers the same.
LCM of 1 and 8 = 8
Purple : Red
1 : 8
Answer(s): 1 : 8