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14. Mel’s mistake is that she put the number over a thousand, instead of hundred. She added an extra zero she didn’t need and that’s where she messed up at. The real answer is 4 28/100 or 4 7/25 in simplest form.
15. This is sometimes true, because when simplifying a fraction, you have denominators like 10, 50, 100, 200, and 1,000, which are divisible by both 2 and 5. In other times, you have denominators those like 2, 5, and 25, who go into one number, but not the other number.
