A) 1 yr. 9 months : 2 yrs. 4 months
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Answer:
3:4
Step-by-step explanation:
1 year 9 months =12 months +9 months =21 months
2 years 4 months =24 months +4months =28 months
therefore
1 year 9 months :2 year's 4 months
21:28
3:4
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