Answers

Subtract 81/70 from 70/20

1^st number: 3 10/20, 2^nd number: 1 11/70

70/20 - 81/70 is 82/35.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 70 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 20 × 7 = 140,
   70/20 = 70 × 7/20 × 7 = 490/140
3. Likewise, for the 2nd fraction, since 70 × 2 = 140,
   81/70 = 81 × 2/70 × 2 = 162/140
4. Subtract the two like fractions:
   490/140 - 162/140 = 490 - 162/140 = 328/140
5. After reducing the fraction, the answer is 82/35
6. In mixed form: 212/35

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