Answers

Subtract 81/40 from 3/70

1^st number: 3/70, 2^nd number: 2 1/40

3/70 - 81/40 is -111/56.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 40 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 70 × 4 = 280,
   3/70 = 3 × 4/70 × 4 = 12/280
3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
   81/40 = 81 × 7/40 × 7 = 567/280
4. Subtract the two like fractions:
   12/280 - 567/280 = 12 - 567/280 = -555/280
5. After reducing the fraction, the answer is -111/56

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