Answers

Subtract 32/80 from 20/72

20/72 - 32/80 is -11/90.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 80 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 72 × 10 = 720,
   20/72 = 20 × 10/72 × 10 = 200/720
3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
   32/80 = 32 × 9/80 × 9 = 288/720
4. Subtract the two like fractions:
   200/720 - 288/720 = 200 - 288/720 = -88/720
5. After reducing the fraction, the answer is -11/90

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