Answers

Subtract 72/35 from 10/21

1^st number: 10/21, 2^nd number: 2 2/35

10/21 - 72/35 is -166/105.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 35 is 105
   
   Next, find the equivalent fraction of both fractional numbers with denominator 105
2. For the 1st fraction, since 21 × 5 = 105,
   10/21 = 10 × 5/21 × 5 = 50/105
3. Likewise, for the 2nd fraction, since 35 × 3 = 105,
   72/35 = 72 × 3/35 × 3 = 216/105
4. Subtract the two like fractions:
   50/105 - 216/105 = 50 - 216/105 = -166/105

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