Arithmeticeasy · Past Paper
If a:b = 5:9 and b:c = 4:7, find a:c.
A20:63
B5:7
C9:4
D36:35
✓ Correct Answer: A — 20:63
a/c = (a/b)*(b/c) = (5/9)*(4/7) = 20/63.
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