Add 15/28 and 18/35
15/28 + 18/35 is 21/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 35 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
15/28 = 15 × 5/28 × 5 = 75/140 - Likewise, for the 2nd fraction, since 35 × 4 = 140,
18/35 = 18 × 4/35 × 4 = 72/140 - Add the two like fractions:
75/140 + 72/140 = 75 + 72/140 = 147/140 - 147/140 simplified gives 21/20
- So, 15/28 + 18/35 = 21/20
In mixed form: 11/20
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