Answers

Subtract 40/7 from 45/80

1^st number: 45/80, 2^nd number: 5 5/7

45/80 - 40/7 is -577/112.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 7 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 80 × 7 = 560,
   45/80 = 45 × 7/80 × 7 = 315/560
3. Likewise, for the 2nd fraction, since 7 × 80 = 560,
   40/7 = 40 × 80/7 × 80 = 3200/560
4. Subtract the two like fractions:
   315/560 - 3200/560 = 315 - 3200/560 = -2885/560
5. After reducing the fraction, the answer is -577/112

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