Answers

Subtract 21/80 from 49/40

1^st number: 1 9/40, 2^nd number: 21/80

49/40 - 21/80 is 77/80.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 80 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 40 × 2 = 80,
   49/40 = 49 × 2/40 × 2 = 98/80
3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
   21/80 = 21 × 1/80 × 1 = 21/80
4. Subtract the two like fractions:
   98/80 - 21/80 = 98 - 21/80 = 77/80

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