Answers

Subtract 6/20 from 7/90

7/90 - 6/20 is -2/9.

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,
   7/90 = 7 × 2/90 × 2 = 14/180
3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
   6/20 = 6 × 9/20 × 9 = 54/180
4. Subtract the two like fractions:
   14/180 - 54/180 = 14 - 54/180 = -40/180
5. After reducing the fraction, the answer is -2/9

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