Answers

Subtract 21/18 from 70/63

1^st number: 1 7/63, 2^nd number: 1 3/18

70/63 - 21/18 is -1/18.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 18 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 63 × 2 = 126,
   70/63 = 70 × 2/63 × 2 = 140/126
3. Likewise, for the 2nd fraction, since 18 × 7 = 126,
   21/18 = 21 × 7/18 × 7 = 147/126
4. Subtract the two like fractions:
   140/126 - 147/126 = 140 - 147/126 = -7/126
5. After reducing the fraction, the answer is -1/18

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