Answers

Subtract 30/15 from 40/28

1^st number: 1 12/28, 2^nd number: 2 0/15

40/28 - 30/15 is -4/7.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 15 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 28 × 15 = 420,
   40/28 = 40 × 15/28 × 15 = 600/420
3. Likewise, for the 2nd fraction, since 15 × 28 = 420,
   30/15 = 30 × 28/15 × 28 = 840/420
4. Subtract the two like fractions:
   600/420 - 840/420 = 600 - 840/420 = -240/420
5. After reducing the fraction, the answer is -4/7

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