Add 12/15 and 18/72
12/15 + 18/72 is 21/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 15 × 24 = 360,
12/15 = 12 × 24/15 × 24 = 288/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
18/72 = 18 × 5/72 × 5 = 90/360 - Add the two like fractions:
288/360 + 90/360 = 288 + 90/360 = 378/360 - 378/360 simplified gives 21/20
- So, 12/15 + 18/72 = 21/20
In mixed form: 11/20
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