Answers

Subtract 3/80 from 90/7

1^st number: 12 6/7, 2^nd number: 3/80

90/7 - 3/80 is 7179/560.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 7 and 80 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 7 × 80 = 560,
   90/7 = 90 × 80/7 × 80 = 7200/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   3/80 = 3 × 7/80 × 7 = 21/560
4. Subtract the two like fractions:
   7200/560 - 21/560 = 7200 - 21/560 = 7179/560
5. In mixed form: 12459/560

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