Subtract 18/21 from 72/16
1st number: 4 8/16, 2nd number: 18/21
72/16 - 18/21 is 51/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 21 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 16 × 21 = 336,
72/16 = 72 × 21/16 × 21 = 1512/336 - Likewise, for the 2nd fraction, since 21 × 16 = 336,
18/21 = 18 × 16/21 × 16 = 288/336 - Subtract the two like fractions:
1512/336 - 288/336 = 1512 - 288/336 = 1224/336 - After reducing the fraction, the answer is 51/14
- In mixed form: 39/14
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