Add 90/15 and 81/12
1st number: 6 0/15, 2nd number: 6 9/12
90/15 + 81/12 is 51/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
90/15 = 90 × 4/15 × 4 = 360/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
81/12 = 81 × 5/12 × 5 = 405/60 - Add the two like fractions:
360/60 + 405/60 = 360 + 405/60 = 765/60 - 765/60 simplified gives 51/4
- So, 90/15 + 81/12 = 51/4
In mixed form: 123/4
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