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Sagot :
Answer:
45 old houses
Step-by-step explanation:
new houses : old houses
3 : 9
15 : ?
(3 = 1st ratio and 9 = 2nd ratio)
To find the missing ratio, divide the first ratio from the new ratio:
15 / 3 = 5
Take the product and multiply that by the second ratio to find the missing ratio:
9 x 5 = 45
Answer:
45 old houses
Step-by-step explanation:
What I did:
I divided 15 by 3, to get an idea of the 'scale' which gives us 5
for every 9 old houses, we have 3 new ones; so to scale be multiply the base number by our "scale" number, 5.
3 * 5 = 15 new houses
8 * 5 = 45 old houses
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