Answers

Subtract 49/80 from 25/21

1^st number: 1 4/21, 2^nd number: 49/80

25/21 - 49/80 is 971/1680.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 80 is 1680
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1680
2. For the 1st fraction, since 21 × 80 = 1680,
   25/21 = 25 × 80/21 × 80 = 2000/1680
3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
   49/80 = 49 × 21/80 × 21 = 1029/1680
4. Subtract the two like fractions:
   2000/1680 - 1029/1680 = 2000 - 1029/1680 = 971/1680

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