Answers

Subtract 49/90 from 27/21

1^st number: 1 6/21, 2^nd number: 49/90

27/21 - 49/90 is 467/630.

Steps for subtracting fractions

1. 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
2. For the 1st fraction, since 21 × 30 = 630,
   27/21 = 27 × 30/21 × 30 = 810/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   49/90 = 49 × 7/90 × 7 = 343/630
4. Subtract the two like fractions:
   810/630 - 343/630 = 810 - 343/630 = 467/630

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