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When doing changing fractions to equivalent fractions, if you multiply or divide the denominator by a number, you have to do the same to the numerator. Here is an example:
2/3 + 4/5 =
To find the LCM of 3 and 5, list the multiples of each until you find one that they have in common:
3, 6, 9, 12, 15, 18...
5, 10, 15, 20...
15 is the LCM.
To change the 3 in 2/3 to 15, multiply it by 5. Since you multiplied 3 by 5, you have to multiply the 2 by 5. The equialent fraction is 10/15.
To change the 5 in 4/5 to 15, multiply it by 3. 3 x 5 = 15. Now, you have to do the same to the numerator 4. 3 x 4 = 12. The fraction is 12/15.
Now, you can add the fractions together:
10/15 + 12/15 = 22/15, but it is an improper fraction, so you need to change it to a mixed number. To find the whole number, divide the numberator by the denominator. 22 divided by 15 is 1 with a remainder of 7. Use the 7 as the numerator and the 12 (the number you divided by) as the denominator.
The answer is 1 7/12. It is in simplest form because 7 is a Prime number that will not divide evenly into 12.
Wiki User
∙ 10y ago
Wiki User
∙ 15y agoIf you have 2 fractions like this: 2/4 and ?/8 First, 8 Divided by 4 is 2, so multiply 2x2, equals 4. The answer is 4/8
Destinee Clark
Sharan dilip
Wiki User
∙ 14y agoCommon numerator of 1/2 and 3/10
(multiply 1/2 by 3)
3/6 and 3/10 now have common numerators
Destinee Clark
12=6/8
Destinee Clark
12= 6/8
Fekade Terefe
18/63*2/x
S Raajeswari
14÷26=35÷?
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