Sausages come in packets of 9. Bread rolls come in packets of 6. Colin wants to buy enough packs of sausages and rolls so that there are an equal number of sausages and rolls. What is the minimum number of sausages and rolls he needs to buy?
We just need to find the LCD of 6 and 9 ..... this = 18
So.....if he buys 18/ 9 = 2 package of sausages and 18 / 6 = 3 packets of rolls he will have the same number
Proof
2 * 9 =18
And
3 * 6 =18
first find the common multiple of 9 and 6.
then multiply both numbers by that number.
9x2=18
6x3=18
18x2=36