Subtract 1/21 from 30/15
1st number: 2 0/15, 2nd number: 1/21
30/15 - 1/21 is 41/21.
Steps for subtracting 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,
30/15 = 30 × 7/15 × 7 = 210/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
1/21 = 1 × 5/21 × 5 = 5/105 - Subtract the two like fractions:
210/105 - 5/105 = 210 - 5/105 = 205/105 - After reducing the fraction, the answer is 41/21
- In mixed form: 120/21
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