Answers

Subtract 24/80 from 20/90

20/90 - 24/80 is -7/90.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 80 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 90 × 8 = 720,
   20/90 = 20 × 8/90 × 8 = 160/720
3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
   24/80 = 24 × 9/80 × 9 = 216/720
4. Subtract the two like fractions:
   160/720 - 216/720 = 160 - 216/720 = -56/720
5. After reducing the fraction, the answer is -7/90

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