Answers

Subtract 90/36 from 12/30

1^st number: 12/30, 2^nd number: 2 18/36

12/30 - 90/36 is -21/10.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 36 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 30 × 6 = 180,
   12/30 = 12 × 6/30 × 6 = 72/180
3. Likewise, for the 2nd fraction, since 36 × 5 = 180,
   90/36 = 90 × 5/36 × 5 = 450/180
4. Subtract the two like fractions:
   72/180 - 450/180 = 72 - 450/180 = -378/180
5. After reducing the fraction, the answer is -21/10

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