Answers

Subtract 45/20 from 4/72

1^st number: 4/72, 2^nd number: 2 5/20

4/72 - 45/20 is -79/36.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 20 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 72 × 5 = 360,
   4/72 = 4 × 5/72 × 5 = 20/360
3. Likewise, for the 2nd fraction, since 20 × 18 = 360,
   45/20 = 45 × 18/20 × 18 = 810/360
4. Subtract the two like fractions:
   20/360 - 810/360 = 20 - 810/360 = -790/360
5. After reducing the fraction, the answer is -79/36

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