Add 30/15 and 20/21
1st number: 2 0/15, 2nd number: 20/21
30/15 + 20/21 is 62/21.
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,
30/15 = 30 × 7/15 × 7 = 210/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
20/21 = 20 × 5/21 × 5 = 100/105 - Add the two like fractions:
210/105 + 100/105 = 210 + 100/105 = 310/105 - 310/105 simplified gives 62/21
- So, 30/15 + 20/21 = 62/21
In mixed form: 220/21
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