Subtract 72/4 from 1/21
1st number: 1/21, 2nd number: 18 0/4
1/21 - 72/4 is -377/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
1/21 = 1 × 4/21 × 4 = 4/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
72/4 = 72 × 21/4 × 21 = 1512/84 - Subtract the two like fractions:
4/84 - 1512/84 = 4 - 1512/84 = -1508/84 - After reducing the fraction, the answer is -377/21
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