Add 18/10 and 21/12
1st number: 1 8/10, 2nd number: 1 9/12
18/10 + 21/12 is 71/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 10 × 6 = 60,
18/10 = 18 × 6/10 × 6 = 108/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
21/12 = 21 × 5/12 × 5 = 105/60 - Add the two like fractions:
108/60 + 105/60 = 108 + 105/60 = 213/60 - 213/60 simplified gives 71/20
- So, 18/10 + 21/12 = 71/20
In mixed form: 311/20
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