Subtract 8/10 from 27/21, Solve 1 6/21

Subtract 8/10 from 27/21

1^st number: 1 6/21, 2^nd number: 8/10

27/21 - 8/10 is 17/35.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 21 × 10 = 210,
27/21 = 27 × 10/21 × 10 = 270/210
Likewise, for the 2nd fraction, since 10 × 21 = 210,
8/10 = 8 × 21/10 × 21 = 168/210
Subtract the two like fractions:
270/210 - 168/210 = 270 - 168/210 = 102/210
After reducing the fraction, the answer is 17/35

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