Answers

Subtract 20/7 from 70/80

1^st number: 70/80, 2^nd number: 2 6/7

70/80 - 20/7 is -111/56.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 7 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 80 × 7 = 560,
   70/80 = 70 × 7/80 × 7 = 490/560
3. Likewise, for the 2nd fraction, since 7 × 80 = 560,
   20/7 = 20 × 80/7 × 80 = 1600/560
4. Subtract the two like fractions:
   490/560 - 1600/560 = 490 - 1600/560 = -1110/560
5. After reducing the fraction, the answer is -111/56

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