Add 90/27 and 75/20
1st number: 3 9/27, 2nd number: 3 15/20
90/27 + 75/20 is 85/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 20 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 27 × 20 = 540,
90/27 = 90 × 20/27 × 20 = 1800/540 - Likewise, for the 2nd fraction, since 20 × 27 = 540,
75/20 = 75 × 27/20 × 27 = 2025/540 - Add the two like fractions:
1800/540 + 2025/540 = 1800 + 2025/540 = 3825/540 - 3825/540 simplified gives 85/12
- So, 90/27 + 75/20 = 85/12
In mixed form: 71/12
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