Answers

Subtract 18/28 from 81/80

1^st number: 1 1/80, 2^nd number: 18/28

81/80 - 18/28 is 207/560.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 28 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 80 × 7 = 560,
   81/80 = 81 × 7/80 × 7 = 567/560
3. Likewise, for the 2nd fraction, since 28 × 20 = 560,
   18/28 = 18 × 20/28 × 20 = 360/560
4. Subtract the two like fractions:
   567/560 - 360/560 = 567 - 360/560 = 207/560

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