Subtract 25/21 from 14/90, Solve 14/90

Subtract 25/21 from 14/90

1^st number: 14/90, 2^nd number: 1 4/21

14/90 - 25/21 is -326/315.

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

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 90 × 7 = 630,
14/90 = 14 × 7/90 × 7 = 98/630
Likewise, for the 2nd fraction, since 21 × 30 = 630,
25/21 = 25 × 30/21 × 30 = 750/630
Subtract the two like fractions:
98/630 - 750/630 = 98 - 750/630 = -652/630
After reducing the fraction, the answer is -326/315

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