Subtract 21/10 from 9/27, Solve 9/27

Subtract 21/10 from 9/27

1^st number: 9/27, 2^nd number: 2 1/10

9/27 - 21/10 is -53/30.

Find the least common denominator or LCM of the two denominators:
LCM of 27 and 10 is 270

Next, find the equivalent fraction of both fractional numbers with denominator 270
For the 1st fraction, since 27 × 10 = 270,
9/27 = 9 × 10/27 × 10 = 90/270
Likewise, for the 2nd fraction, since 10 × 27 = 270,
21/10 = 21 × 27/10 × 27 = 567/270
Subtract the two like fractions:
90/270 - 567/270 = 90 - 567/270 = -477/270
After reducing the fraction, the answer is -53/30

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