Answers

Subtract 70/8 from 20/84

1^st number: 20/84, 2^nd number: 8 6/8

20/84 - 70/8 is -715/84.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 8 is 168
   
   Next, find the equivalent fraction of both fractional numbers with denominator 168
2. For the 1st fraction, since 84 × 2 = 168,
   20/84 = 20 × 2/84 × 2 = 40/168
3. Likewise, for the 2nd fraction, since 8 × 21 = 168,
   70/8 = 70 × 21/8 × 21 = 1470/168
4. Subtract the two like fractions:
   40/168 - 1470/168 = 40 - 1470/168 = -1430/168
5. After reducing the fraction, the answer is -715/84

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