Answers

Subtract 40/7 from 80/72

1^st number: 1 8/72, 2^nd number: 5 5/7

80/72 - 40/7 is -290/63.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 7 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 72 × 7 = 504,
   80/72 = 80 × 7/72 × 7 = 560/504
3. Likewise, for the 2nd fraction, since 7 × 72 = 504,
   40/7 = 40 × 72/7 × 72 = 2880/504
4. Subtract the two like fractions:
   560/504 - 2880/504 = 560 - 2880/504 = -2320/504
5. After reducing the fraction, the answer is -290/63

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