Answers

Subtract 90/80 from 10/20

1^st number: 10/20, 2^nd number: 1 10/80

10/20 - 90/80 is -5/8.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 80 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 20 × 4 = 80,
   10/20 = 10 × 4/20 × 4 = 40/80
3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
   90/80 = 90 × 1/80 × 1 = 90/80
4. Subtract the two like fractions:
   40/80 - 90/80 = 40 - 90/80 = -50/80
5. After reducing the fraction, the answer is -5/8

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