Answers

Subtract 63/80 from 90/40

1^st number: 2 10/40, 2^nd number: 63/80

90/40 - 63/80 is 117/80.

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,
   90/40 = 90 × 2/40 × 2 = 180/80
3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
   63/80 = 63 × 1/80 × 1 = 63/80
4. Subtract the two like fractions:
   180/80 - 63/80 = 180 - 63/80 = 117/80
5. In mixed form: 137/80

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