Answers

Subtract 9/28 from 42/20

1^st number: 2 2/20, 2^nd number: 9/28

42/20 - 9/28 is 249/140.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 28 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 20 × 7 = 140,
   42/20 = 42 × 7/20 × 7 = 294/140
3. Likewise, for the 2nd fraction, since 28 × 5 = 140,
   9/28 = 9 × 5/28 × 5 = 45/140
4. Subtract the two like fractions:
   294/140 - 45/140 = 294 - 45/140 = 249/140
5. In mixed form: 1109/140

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