Answers

Subtract 7/90 from 8/7

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

8/7 - 7/90 is 671/630.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 7 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 7 × 90 = 630,
   8/7 = 8 × 90/7 × 90 = 720/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   7/90 = 7 × 7/90 × 7 = 49/630
4. Subtract the two like fractions:
   720/630 - 49/630 = 720 - 49/630 = 671/630
5. In mixed form: 141/630

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