Add 20/15 and 35/21
1st number: 1 5/15, 2nd number: 1 14/21
20/15 + 35/21 is 3/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 21 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 21 × 5 = 105,
35/21 = 35 × 5/21 × 5 = 175/105 - Add the two like fractions:
140/105 + 175/105 = 140 + 175/105 = 315/105 - 315/105 simplified gives 3/1
- So, 20/15 + 35/21 = 3/1
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