Answers

Subtract 90/18 from 50/20

1^st number: 2 10/20, 2^nd number: 5 0/18

50/20 - 90/18 is -5/2.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 18 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 20 × 9 = 180,
   50/20 = 50 × 9/20 × 9 = 450/180
3. Likewise, for the 2nd fraction, since 18 × 10 = 180,
   90/18 = 90 × 10/18 × 10 = 900/180
4. Subtract the two like fractions:
   450/180 - 900/180 = 450 - 900/180 = -450/180
5. After reducing the fraction, the answer is -5/2

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