Add 21/15 and 80/63
1st number: 1 6/15, 2nd number: 1 17/63
21/15 + 80/63 is 841/315.
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,
21/15 = 21 × 21/15 × 21 = 441/315 - Likewise, for the 2nd fraction, since 63 × 5 = 315,
80/63 = 80 × 5/63 × 5 = 400/315 - Add the two like fractions:
441/315 + 400/315 = 441 + 400/315 = 841/315 - So, 21/15 + 80/63 = 841/315
In mixed form: 2211/315
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