Answers

Subtract 81/70 from 10/30

1^st number: 10/30, 2^nd number: 1 11/70

10/30 - 81/70 is -173/210.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 70 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 30 × 7 = 210,
   10/30 = 10 × 7/30 × 7 = 70/210
3. Likewise, for the 2nd fraction, since 70 × 3 = 210,
   81/70 = 81 × 3/70 × 3 = 243/210
4. Subtract the two like fractions:
   70/210 - 243/210 = 70 - 243/210 = -173/210

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