Subtract 3/9 from 21/14, Solve 1 7/14

Subtract 3/9 from 21/14

1^st number: 1 7/14, 2^nd number: 3/9

21/14 - 3/9 is 7/6.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 9 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 14 × 9 = 126,
21/14 = 21 × 9/14 × 9 = 189/126
Likewise, for the 2nd fraction, since 9 × 14 = 126,
3/9 = 3 × 14/9 × 14 = 42/126
Subtract the two like fractions:
189/126 - 42/126 = 189 - 42/126 = 147/126
After reducing the fraction, the answer is 7/6
In mixed form: 11/6

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