A box contains some grey, brown and black chocolate bars. The ratio of the number of grey chocolate bars to the number of brown chocolate bars is 5 : 8. The ratio of the number of brown chocolate bars to the number of black chocolate bars is also 5 : 8. What is the ratio of the number of grey chocolate bars to the number of black chocolate bars in the box?
Grey |
Brown |
Black |
5x5 |
8x5 |
|
|
5x8 |
8x8 |
25 u |
40 u |
64 u |
The number of brown chocolate bars is the repeated identity.
LCM of 5 and 8 = 40
Grey chocolate bars : Black chocolate bars
25 : 64
Answer(s): 25 : 64