Add 5/15 and 12/42
5/15 + 12/42 is 13/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
5/15 = 5 × 14/15 × 14 = 70/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
12/42 = 12 × 5/42 × 5 = 60/210 - Add the two like fractions:
70/210 + 60/210 = 70 + 60/210 = 130/210 - 130/210 simplified gives 13/21
- So, 5/15 + 12/42 = 13/21
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