Add 72/15 and 28/18
1st number: 4 12/15, 2nd number: 1 10/18
72/15 + 28/18 is 286/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
72/15 = 72 × 6/15 × 6 = 432/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
28/18 = 28 × 5/18 × 5 = 140/90 - Add the two like fractions:
432/90 + 140/90 = 432 + 140/90 = 572/90 - 572/90 simplified gives 286/45
- So, 72/15 + 28/18 = 286/45
In mixed form: 616/45
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