Answers

Subtract 42/80 from 45/28

1^st number: 1 17/28, 2^nd number: 42/80

45/28 - 42/80 is 303/280.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 80 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 28 × 20 = 560,
   45/28 = 45 × 20/28 × 20 = 900/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   42/80 = 42 × 7/80 × 7 = 294/560
4. Subtract the two like fractions:
   900/560 - 294/560 = 900 - 294/560 = 606/560
5. After reducing the fraction, the answer is 303/280
6. In mixed form: 123/280

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