Add 9/15 and 4/21
9/15 + 4/21 is 83/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
9/15 = 9 × 7/15 × 7 = 63/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
4/21 = 4 × 5/21 × 5 = 20/105 - Add the two like fractions:
63/105 + 20/105 = 63 + 20/105 = 83/105 - So, 9/15 + 4/21 = 83/105
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