Answers

Subtract 45/90 from 40/20

1^st number: 2 0/20, 2^nd number: 45/90

40/20 - 45/90 is 3/2.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 90 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 20 × 9 = 180,
   40/20 = 40 × 9/20 × 9 = 360/180
3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
   45/90 = 45 × 2/90 × 2 = 90/180
4. Subtract the two like fractions:
   360/180 - 90/180 = 360 - 90/180 = 270/180
5. After reducing the fraction, the answer is 3/2
6. In mixed form: 11/2

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