PSLE A bag contains erasers of three different colours.
13 of the erasers are purple. The ratio of the number of orange erasers to that of red erasers is 8 : 1. What is the ratio of the number of orange erasers to that of purple erasers?
Purple |
Orange |
Red |
Total |
1x9 |
2x9 |
3x9 |
|
8x2 |
1x2 |
|
9 u |
16 u |
2 u |
27 u |
The total number of red and orange erasers is the combined repeated identity.
Make the total number red and orange erasers the same.
LCM of 2 and 9 = 18
Orange : Purple
16 : 9
Answer(s): 16 : 9