Answers

Subtract 72/49 from 10/21

1^st number: 10/21, 2^nd number: 1 23/49

10/21 - 72/49 is -146/147.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 49 is 147
   
   Next, find the equivalent fraction of both fractional numbers with denominator 147
2. For the 1st fraction, since 21 × 7 = 147,
   10/21 = 10 × 7/21 × 7 = 70/147
3. Likewise, for the 2nd fraction, since 49 × 3 = 147,
   72/49 = 72 × 3/49 × 3 = 216/147
4. Subtract the two like fractions:
   70/147 - 216/147 = 70 - 216/147 = -146/147

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