Answers

Subtract 8/20 from 3/90

3/90 - 8/20 is -11/30.

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,
   3/90 = 3 × 2/90 × 2 = 6/180
3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
   8/20 = 8 × 9/20 × 9 = 72/180
4. Subtract the two like fractions:
   6/180 - 72/180 = 6 - 72/180 = -66/180
5. After reducing the fraction, the answer is -11/30

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