PSLE Linda has a number of notebooks in three colours: blue, purple and orange.
57 of the notebooks are blue. The number of blue notebooks is four times the number of purple notebooks. What fraction of the notebooks is orange?
Blue |
Purple |
Orange |
Total |
5x4 |
2x4 |
7x4 |
4x5 |
1x5 |
|
|
20 u |
5 u |
3 u |
28 u |
Number of blue notebooks is the repeated identity.
Make the number of blue notebooks the same.
LCM of 5 and 4 = 20
Number of orange notebooks
= 28 u - 20 u - 5 u
= 3 u
Fraction of the notebooks that is orange
=
328 Answer(s):
328