Add 90/27 and 42/30
1st number: 3 9/27, 2nd number: 1 12/30
90/27 + 42/30 is 71/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 30 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 27 × 10 = 270,
90/27 = 90 × 10/27 × 10 = 900/270 - Likewise, for the 2nd fraction, since 30 × 9 = 270,
42/30 = 42 × 9/30 × 9 = 378/270 - Add the two like fractions:
900/270 + 378/270 = 900 + 378/270 = 1278/270 - 1278/270 simplified gives 71/15
- So, 90/27 + 42/30 = 71/15
In mixed form: 411/15
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