Subtract 12/90 from 35/21, Solve 1 14/21

Subtract 12/90 from 35/21

1^st number: 1 14/21, 2^nd number: 12/90

35/21 - 12/90 is 23/15.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 90 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 21 × 30 = 630,
35/21 = 35 × 30/21 × 30 = 1050/630
Likewise, for the 2nd fraction, since 90 × 7 = 630,
12/90 = 12 × 7/90 × 7 = 84/630
Subtract the two like fractions:
1050/630 - 84/630 = 1050 - 84/630 = 966/630
After reducing the fraction, the answer is 23/15
In mixed form: 18/15

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