Answers

Subtract 90/27 from 63/70

1^st number: 63/70, 2^nd number: 3 9/27

63/70 - 90/27 is -73/30.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 27 is 1890
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1890
2. For the 1st fraction, since 70 × 27 = 1890,
   63/70 = 63 × 27/70 × 27 = 1701/1890
3. Likewise, for the 2nd fraction, since 27 × 70 = 1890,
   90/27 = 90 × 70/27 × 70 = 6300/1890
4. Subtract the two like fractions:
   1701/1890 - 6300/1890 = 1701 - 6300/1890 = -4599/1890
5. After reducing the fraction, the answer is -73/30

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