Add 15/18 and 18/40
15/18 + 18/40 is 77/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 18 × 20 = 360,
15/18 = 15 × 20/18 × 20 = 300/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
18/40 = 18 × 9/40 × 9 = 162/360 - Add the two like fractions:
300/360 + 162/360 = 300 + 162/360 = 462/360 - 462/360 simplified gives 77/60
- So, 15/18 + 18/40 = 77/60
In mixed form: 117/60
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