Subtract 60/21 from 30/15
1st number: 2 0/15, 2nd number: 2 18/21
30/15 - 60/21 is -6/7.
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,
60/21 = 60 × 5/21 × 5 = 300/105 - Subtract the two like fractions:
210/105 - 300/105 = 210 - 300/105 = -90/105 - After reducing the fraction, the answer is -6/7
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