Answers

Subtract 15/20 from 50/90

50/90 - 15/20 is -7/36.

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,
   50/90 = 50 × 2/90 × 2 = 100/180
3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
   15/20 = 15 × 9/20 × 9 = 135/180
4. Subtract the two like fractions:
   100/180 - 135/180 = 100 - 135/180 = -35/180
5. After reducing the fraction, the answer is -7/36

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