Add 15/20 and 27/28
15/20 + 27/28 is 12/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
15/20 = 15 × 7/20 × 7 = 105/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
27/28 = 27 × 5/28 × 5 = 135/140 - Add the two like fractions:
105/140 + 135/140 = 105 + 135/140 = 240/140 - 240/140 simplified gives 12/7
- So, 15/20 + 27/28 = 12/7
In mixed form: 15/7
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