Answers

Subtract 35/20 from 28/90

1^st number: 28/90, 2^nd number: 1 15/20

28/90 - 35/20 is -259/180.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 20 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 90 × 2 = 180,
   28/90 = 28 × 2/90 × 2 = 56/180
3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
   35/20 = 35 × 9/20 × 9 = 315/180
4. Subtract the two like fractions:
   56/180 - 315/180 = 56 - 315/180 = -259/180

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