Subtract 3/21 from 72/4
1st number: 18 0/4, 2nd number: 3/21
72/4 - 3/21 is 125/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
72/4 = 72 × 21/4 × 21 = 1512/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
3/21 = 3 × 4/21 × 4 = 12/84 - Subtract the two like fractions:
1512/84 - 12/84 = 1512 - 12/84 = 1500/84 - After reducing the fraction, the answer is 125/7
- In mixed form: 176/7
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