Add 90/7 and 15/20
1st number: 12 6/7, 2nd number: 15/20
90/7 + 15/20 is 381/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
90/7 = 90 × 20/7 × 20 = 1800/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
15/20 = 15 × 7/20 × 7 = 105/140 - Add the two like fractions:
1800/140 + 105/140 = 1800 + 105/140 = 1905/140 - 1905/140 simplified gives 381/28
- So, 90/7 + 15/20 = 381/28
In mixed form: 1317/28
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