Answers

Subtract 20/7 from 90/70

1^st number: 1 20/70, 2^nd number: 2 6/7

90/70 - 20/7 is -11/7.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 7 is 70
   
   Next, find the equivalent fraction of both fractional numbers with denominator 70
2. For the 1st fraction, since 70 × 1 = 70,
   90/70 = 90 × 1/70 × 1 = 90/70
3. Likewise, for the 2nd fraction, since 7 × 10 = 70,
   20/7 = 20 × 10/7 × 10 = 200/70
4. Subtract the two like fractions:
   90/70 - 200/70 = 90 - 200/70 = -110/70
5. After reducing the fraction, the answer is -11/7

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