Answers

Subtract 28/40 from 45/42

1^st number: 1 3/42, 2^nd number: 28/40

45/42 - 28/40 is 13/35.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 40 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 42 × 20 = 840,
   45/42 = 45 × 20/42 × 20 = 900/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   28/40 = 28 × 21/40 × 21 = 588/840
4. Subtract the two like fractions:
   900/840 - 588/840 = 900 - 588/840 = 312/840
5. After reducing the fraction, the answer is 13/35

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