Add 21/8 and 90/12
1st number: 2 5/8, 2nd number: 7 6/12
21/8 + 90/12 is 81/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 12 is 24
Next, find the equivalent fraction of both fractional numbers with denominator 24 - For the 1st fraction, since 8 × 3 = 24,
21/8 = 21 × 3/8 × 3 = 63/24 - Likewise, for the 2nd fraction, since 12 × 2 = 24,
90/12 = 90 × 2/12 × 2 = 180/24 - Add the two like fractions:
63/24 + 180/24 = 63 + 180/24 = 243/24 - 243/24 simplified gives 81/8
- So, 21/8 + 90/12 = 81/8
In mixed form: 101/8
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