Answers

Subtract 12/20 from 75/90

75/90 - 12/20 is 7/30.

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,
   75/90 = 75 × 2/90 × 2 = 150/180
3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
   12/20 = 12 × 9/20 × 9 = 108/180
4. Subtract the two like fractions:
   150/180 - 108/180 = 150 - 108/180 = 42/180
5. After reducing the fraction, the answer is 7/30

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