Subtract 81/5 from 36/21
1st number: 1 15/21, 2nd number: 16 1/5
36/21 - 81/5 is -507/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 5 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
36/21 = 36 × 5/21 × 5 = 180/105 - Likewise, for the 2nd fraction, since 5 × 21 = 105,
81/5 = 81 × 21/5 × 21 = 1701/105 - Subtract the two like fractions:
180/105 - 1701/105 = 180 - 1701/105 = -1521/105 - After reducing the fraction, the answer is -507/35
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