Answer:
5/28
Explanation:
10:56=10/56=5/28
10:56 = ?; 1/4% = 1/400; 11:15 = ?; 3/5% = 3/500; 12:13 = ?; 1/3% = 1/300
10:56, 11:15, 12:13, are not viable to be converted so I don't understand but here is the rest.
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