Answers

Subtract 49/21 from 35/90

1^st number: 35/90, 2^nd number: 2 7/21

35/90 - 49/21 is -35/18.

Steps for subtracting fractions

1. 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
2. For the 1st fraction, since 90 × 7 = 630,
   35/90 = 35 × 7/90 × 7 = 245/630
3. Likewise, for the 2nd fraction, since 21 × 30 = 630,
   49/21 = 49 × 30/21 × 30 = 1470/630
4. Subtract the two like fractions:
   245/630 - 1470/630 = 245 - 1470/630 = -1225/630
5. After reducing the fraction, the answer is -35/18

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