Anyone?
Guys,
Just looking through a chapter on Ratio's and one of the examples is:
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Q: Divide a mass of 380 kg in the ratio 3/4 : 1/5
S: It is simpler to work with whole numbers, so first of all we produce and equivalent ratio by multiplying each term, first by 4, and then by 5 to give
3/4 : 1/5 = 3 : 4/5 = 15:4
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I understand how to get from 3/4 : 1/5 to 15 : 4 by the lcm but I'm not sure where the 3 : 4/5 comes from, thats the step I'm missing.
Thanks