Answers

Subtract 49/10 from 42/63

1^st number: 42/63, 2^nd number: 4 9/10

42/63 - 49/10 is -127/30.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 10 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 63 × 10 = 630,
   42/63 = 42 × 10/63 × 10 = 420/630
3. Likewise, for the 2nd fraction, since 10 × 63 = 630,
   49/10 = 49 × 63/10 × 63 = 3087/630
4. Subtract the two like fractions:
   420/630 - 3087/630 = 420 - 3087/630 = -2667/630
5. After reducing the fraction, the answer is -127/30

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