It is neccesary because you cannot subtract them without having a common denominator so you have to rename 4 1/2
Divide the largest one by the smallest one : for example, the number 4 is 42=2× larger than the number 2.
Indeed, If you multiply 2 by 42 you'll get 4.
Of course, if a number is n× larger than another, then this other is n× smaller than the first one.
It will of course work with floating point : 0.6×10.6≈0.6×1.6667=1 so 1 is ~1.6667 times larger than 0.6 while 0.6 is ~1.6667 smaller than 1.
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I know that one is obtuse and acute
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A.) 5/162
the numerator is increasing by 1 and the denominator is being multiplied by 3 each time
