Answers

Subtract 90/36 from 90/45

1^st number: 2 0/45, 2^nd number: 2 18/36

90/45 - 90/36 is -1/2.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 36 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 45 × 4 = 180,
   90/45 = 90 × 4/45 × 4 = 360/180
3. Likewise, for the 2nd fraction, since 36 × 5 = 180,
   90/36 = 90 × 5/36 × 5 = 450/180
4. Subtract the two like fractions:
   360/180 - 450/180 = 360 - 450/180 = -90/180
5. After reducing the fraction, the answer is -1/2

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