Subtract 2/15 from 15/21
15/21 - 2/15 is 61/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 15 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
15/21 = 15 × 5/21 × 5 = 75/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
2/15 = 2 × 7/15 × 7 = 14/105 - Subtract the two like fractions:
75/105 - 14/105 = 75 - 14/105 = 61/105
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