Add 18/63 and 20/15
1st number: 18/63, 2nd number: 1 5/15
18/63 + 20/15 is 34/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 15 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 63 × 5 = 315,
18/63 = 18 × 5/63 × 5 = 90/315 - Likewise, for the 2nd fraction, since 15 × 21 = 315,
20/15 = 20 × 21/15 × 21 = 420/315 - Add the two like fractions:
90/315 + 420/315 = 90 + 420/315 = 510/315 - 510/315 simplified gives 34/21
- So, 18/63 + 20/15 = 34/21
In mixed form: 113/21
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