Answers

Subtract 21/7 from 49/80

1^st number: 49/80, 2^nd number: 3 0/7

49/80 - 21/7 is -191/80.

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,
   49/80 = 49 × 7/80 × 7 = 343/560
3. Likewise, for the 2nd fraction, since 7 × 80 = 560,
   21/7 = 21 × 80/7 × 80 = 1680/560
4. Subtract the two like fractions:
   343/560 - 1680/560 = 343 - 1680/560 = -1337/560
5. After reducing the fraction, the answer is -191/80

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