Answers

Subtract 42/6 from 49/20

1^st number: 2 9/20, 2^nd number: 7 0/6

49/20 - 42/6 is -91/20.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 6 is 60
   
   Next, find the equivalent fraction of both fractional numbers with denominator 60
2. For the 1st fraction, since 20 × 3 = 60,
   49/20 = 49 × 3/20 × 3 = 147/60
3. Likewise, for the 2nd fraction, since 6 × 10 = 60,
   42/6 = 42 × 10/6 × 10 = 420/60
4. Subtract the two like fractions:
   147/60 - 420/60 = 147 - 420/60 = -273/60
5. After reducing the fraction, the answer is -91/20

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