Subtract 5/90 from 56/21, Solve 2 14/21

Subtract 5/90 from 56/21

1^st number: 2 14/21, 2^nd number: 5/90

56/21 - 5/90 is 47/18.

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,
56/21 = 56 × 30/21 × 30 = 1680/630
Likewise, for the 2nd fraction, since 90 × 7 = 630,
5/90 = 5 × 7/90 × 7 = 35/630
Subtract the two like fractions:
1680/630 - 35/630 = 1680 - 35/630 = 1645/630
After reducing the fraction, the answer is 47/18
In mixed form: 211/18

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