Add 20/15 and 21/63
1st number: 1 5/15, 2nd number: 21/63
20/15 + 21/63 is 5/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 63 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 15 × 21 = 315,
20/15 = 20 × 21/15 × 21 = 420/315 - Likewise, for the 2nd fraction, since 63 × 5 = 315,
21/63 = 21 × 5/63 × 5 = 105/315 - Add the two like fractions:
420/315 + 105/315 = 420 + 105/315 = 525/315 - 525/315 simplified gives 5/3
- So, 20/15 + 21/63 = 5/3
In mixed form: 12/3
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