Answer:
2.45
Explanation:
2 9/20
3 1/2 ÷ 1 3/7
Change to improper fractions
(2*3+1)/2 ÷ (7*1+3)/7
7/2 ÷10/7
Copy dot flip
7/2 * 7/10
49/20
Change back to a mixed number
20 goes into 49 2 times with 9 left over
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