Answers

Subtract 3/70 from 28/27

1^st number: 1 1/27, 2^nd number: 3/70

28/27 - 3/70 is 1879/1890.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 27 and 70 is 1890
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1890
2. For the 1st fraction, since 27 × 70 = 1890,
   28/27 = 28 × 70/27 × 70 = 1960/1890
3. Likewise, for the 2nd fraction, since 70 × 27 = 1890,
   3/70 = 3 × 27/70 × 27 = 81/1890
4. Subtract the two like fractions:
   1960/1890 - 81/1890 = 1960 - 81/1890 = 1879/1890

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