Question

(a + b) + c = a + (b + c) if a = -2/3 , b = -3/5 and c = 7/8

Answer 1

Step-by-step explanation:

If a:b=4:5 and b:c=7:8 then a:c=?

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a:b=4:5

5a = 4b

a = 4b/5

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b:c=7:8

7c = 8b

c = 8b/7

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a:c = (4b/5):(8b/7)

= (1/5):(2/7)

= 7:10