Answers

Subtract 90/80 from 70/90

1^st number: 70/90, 2^nd number: 1 10/80

70/90 - 90/80 is -25/72.

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,
   70/90 = 70 × 8/90 × 8 = 560/720
3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
   90/80 = 90 × 9/80 × 9 = 810/720
4. Subtract the two like fractions:
   560/720 - 810/720 = 560 - 810/720 = -250/720
5. After reducing the fraction, the answer is -25/72

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