No, 12 to 15 and 4 to 5 are not equal. To determine if two ratios are equal, you need to simplify them to their simplest form. In this case, 12 to 15 simplifies to 4 to 5, so they are equal. However, 4 to 5 cannot be further simplified, so it is not equal to 12 to 15.
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3/5 = 9/15 and is not equal to 12/15
4/5 = 8/10 = 12/15 = 16/20
5/6 is equal to 10/12 or 15/18
No, they are equivalent fractions and equal 3/4 = (3×5)/(4×5) = 15/20
It is 5 to 4