Add 15/25 and 18/28
15/25 + 18/28 is 87/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 28 is 700
Next, find the equivalent fraction of both fractional numbers with denominator 700 - For the 1st fraction, since 25 × 28 = 700,
15/25 = 15 × 28/25 × 28 = 420/700 - Likewise, for the 2nd fraction, since 28 × 25 = 700,
18/28 = 18 × 25/28 × 25 = 450/700 - Add the two like fractions:
420/700 + 450/700 = 420 + 450/700 = 870/700 - 870/700 simplified gives 87/70
- So, 15/25 + 18/28 = 87/70
In mixed form: 117/70
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