fraction question: 3/5+3/4?

= 3/5 + 3/4
= 12/20 + 15/20
= 27/20 or 1 7/20

Answer: 1 7/20

Checking back to the minuend, 3/5:
= 1 7/20 - 3/4
= 27/20 - 3/4
= 27/20 - 15/20
= 12/20 or (12/4)/(20/4) or 3/5

12/20 + 15/20 = 27/20 = 1 7/20.

find a common denominator:
12/20+15/20 = 27/20 or 1 and 7/20

Find the least common denominator (multiple):
5 = 5
4 = 2 x 2
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The LCM of 4 and 5 is:
2 x 2 x 5
= 20

3/5 = (3 x 4)/(5 x 4) = 12/20
3/4 = (3 x 5)/(4 x 5) = 15/20

3/5 + 3/4
= 12/20 + 15/20
= 27/20
= 1 7/20

(12+15)/20=27/20=1.35