Answers

Subtract 81/80 from 1/70

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

1/70 - 81/80 is -559/560.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 80 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 70 × 8 = 560,
   1/70 = 1 × 8/70 × 8 = 8/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   81/80 = 81 × 7/80 × 7 = 567/560
4. Subtract the two like fractions:
   8/560 - 567/560 = 8 - 567/560 = -559/560

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