Subtract 12/45 from 21/14, Solve 1 7/14

Subtract 12/45 from 21/14

1^st number: 1 7/14, 2^nd number: 12/45

21/14 - 12/45 is 37/30.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 45 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 14 × 45 = 630,
21/14 = 21 × 45/14 × 45 = 945/630
Likewise, for the 2nd fraction, since 45 × 14 = 630,
12/45 = 12 × 14/45 × 14 = 168/630
Subtract the two like fractions:
945/630 - 168/630 = 945 - 168/630 = 777/630
After reducing the fraction, the answer is 37/30
In mixed form: 17/30

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