Answers

Subtract 49/10 from 25/21

1^st number: 1 4/21, 2^nd number: 4 9/10

25/21 - 49/10 is -779/210.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 10 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 21 × 10 = 210,
   25/21 = 25 × 10/21 × 10 = 250/210
3. Likewise, for the 2nd fraction, since 10 × 21 = 210,
   49/10 = 49 × 21/10 × 21 = 1029/210
4. Subtract the two like fractions:
   250/210 - 1029/210 = 250 - 1029/210 = -779/210

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