Answers

Subtract 45/15 from 90/80

1^st number: 1 10/80, 2^nd number: 3 0/15

90/80 - 45/15 is -15/8.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 15 is 240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 240
2. For the 1st fraction, since 80 × 3 = 240,
   90/80 = 90 × 3/80 × 3 = 270/240
3. Likewise, for the 2nd fraction, since 15 × 16 = 240,
   45/15 = 45 × 16/15 × 16 = 720/240
4. Subtract the two like fractions:
   270/240 - 720/240 = 270 - 720/240 = -450/240
5. After reducing the fraction, the answer is -15/8

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