Add 21/2 and 90/12
1st number: 10 1/2, 2nd number: 7 6/12
21/2 + 90/12 is 18/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 12 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 2 × 6 = 12,
21/2 = 21 × 6/2 × 6 = 126/12 - Likewise, for the 2nd fraction, since 12 × 1 = 12,
90/12 = 90 × 1/12 × 1 = 90/12 - Add the two like fractions:
126/12 + 90/12 = 126 + 90/12 = 216/12 - 216/12 simplified gives 18/1
- So, 21/2 + 90/12 = 18/1
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