Answers

Subtract 63/4 from 42/70

1^st number: 42/70, 2^nd number: 15 3/4

42/70 - 63/4 is -303/20.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 4 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 70 × 2 = 140,
   42/70 = 42 × 2/70 × 2 = 84/140
3. Likewise, for the 2nd fraction, since 4 × 35 = 140,
   63/4 = 63 × 35/4 × 35 = 2205/140
4. Subtract the two like fractions:
   84/140 - 2205/140 = 84 - 2205/140 = -2121/140
5. After reducing the fraction, the answer is -303/20

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