Answers

Subtract 49/90 from 8/20

8/20 - 49/90 is -13/90.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 90 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 20 × 9 = 180,
   8/20 = 8 × 9/20 × 9 = 72/180
3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
   49/90 = 49 × 2/90 × 2 = 98/180
4. Subtract the two like fractions:
   72/180 - 98/180 = 72 - 98/180 = -26/180
5. After reducing the fraction, the answer is -13/90

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