Add 15/12 and 90/40
1st number: 1 3/12, 2nd number: 2 10/40
15/12 + 90/40 is 7/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 12 × 10 = 120,
15/12 = 15 × 10/12 × 10 = 150/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
90/40 = 90 × 3/40 × 3 = 270/120 - Add the two like fractions:
150/120 + 270/120 = 150 + 270/120 = 420/120 - 420/120 simplified gives 7/2
- So, 15/12 + 90/40 = 7/2
In mixed form: 31/2
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