Add 12/15 and 20/42
12/15 + 20/42 is 134/105.
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,
12/15 = 12 × 14/15 × 14 = 168/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
20/42 = 20 × 5/42 × 5 = 100/210 - Add the two like fractions:
168/210 + 100/210 = 168 + 100/210 = 268/210 - 268/210 simplified gives 134/105
- So, 12/15 + 20/42 = 134/105
In mixed form: 129/105
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