Answers

Subtract 90/36 from 42/15

1^st number: 2 12/15, 2^nd number: 2 18/36

42/15 - 90/36 is 3/10.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 36 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 15 × 12 = 180,
   42/15 = 42 × 12/15 × 12 = 504/180
3. Likewise, for the 2nd fraction, since 36 × 5 = 180,
   90/36 = 90 × 5/36 × 5 = 450/180
4. Subtract the two like fractions:
   504/180 - 450/180 = 504 - 450/180 = 54/180
5. After reducing the fraction, the answer is 3/10

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