Add 21/63 and 9/15
21/63 + 9/15 is 14/15.
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,
21/63 = 21 × 5/63 × 5 = 105/315 - Likewise, for the 2nd fraction, since 15 × 21 = 315,
9/15 = 9 × 21/15 × 21 = 189/315 - Add the two like fractions:
105/315 + 189/315 = 105 + 189/315 = 294/315 - 294/315 simplified gives 14/15
- So, 21/63 + 9/15 = 14/15
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