Add 21/18 and 10/40
1st number: 1 3/18, 2nd number: 10/40
21/18 + 10/40 is 17/12.
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,
21/18 = 21 × 20/18 × 20 = 420/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
10/40 = 10 × 9/40 × 9 = 90/360 - Add the two like fractions:
420/360 + 90/360 = 420 + 90/360 = 510/360 - 510/360 simplified gives 17/12
- So, 21/18 + 10/40 = 17/12
In mixed form: 15/12
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