Add 20/15 and 9/7
1st number: 1 5/15, 2nd number: 1 2/7
20/15 + 9/7 is 55/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 7 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
20/15 = 20 × 7/15 × 7 = 140/105 - Likewise, for the 2nd fraction, since 7 × 15 = 105,
9/7 = 9 × 15/7 × 15 = 135/105 - Add the two like fractions:
140/105 + 135/105 = 140 + 135/105 = 275/105 - 275/105 simplified gives 55/21
- So, 20/15 + 9/7 = 55/21
In mixed form: 213/21
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