Answers

Subtract 21/5 from 42/70

1^st number: 42/70, 2^nd number: 4 1/5

42/70 - 21/5 is -18/5.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 5 is 70
   
   Next, find the equivalent fraction of both fractional numbers with denominator 70
2. For the 1st fraction, since 70 × 1 = 70,
   42/70 = 42 × 1/70 × 1 = 42/70
3. Likewise, for the 2nd fraction, since 5 × 14 = 70,
   21/5 = 21 × 14/5 × 14 = 294/70
4. Subtract the two like fractions:
   42/70 - 294/70 = 42 - 294/70 = -252/70
5. After reducing the fraction, the answer is -18/5

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