Add 18/21 and 10/5
1st number: 18/21, 2nd number: 2 0/5
18/21 + 10/5 is 20/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 5 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
18/21 = 18 × 5/21 × 5 = 90/105 - Likewise, for the 2nd fraction, since 5 × 21 = 105,
10/5 = 10 × 21/5 × 21 = 210/105 - Add the two like fractions:
90/105 + 210/105 = 90 + 210/105 = 300/105 - 300/105 simplified gives 20/7
- So, 18/21 + 10/5 = 20/7
In mixed form: 26/7
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