Add 90/12 and 20/45
1st number: 7 6/12, 2nd number: 20/45
90/12 + 20/45 is 143/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
90/12 = 90 × 15/12 × 15 = 1350/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
20/45 = 20 × 4/45 × 4 = 80/180 - Add the two like fractions:
1350/180 + 80/180 = 1350 + 80/180 = 1430/180 - 1430/180 simplified gives 143/18
- So, 90/12 + 20/45 = 143/18
In mixed form: 717/18
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