Add 18/8 and 21/10
1st number: 2 2/8, 2nd number: 2 1/10
18/8 + 21/10 is 87/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 10 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
18/8 = 18 × 5/8 × 5 = 90/40 - Likewise, for the 2nd fraction, since 10 × 4 = 40,
21/10 = 21 × 4/10 × 4 = 84/40 - Add the two like fractions:
90/40 + 84/40 = 90 + 84/40 = 174/40 - 174/40 simplified gives 87/20
- So, 18/8 + 21/10 = 87/20
In mixed form: 47/20
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