Answers

Subtract 63/20 from 7/72

1^st number: 7/72, 2^nd number: 3 3/20

7/72 - 63/20 is -1099/360.

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,
   7/72 = 7 × 5/72 × 5 = 35/360
3. Likewise, for the 2nd fraction, since 20 × 18 = 360,
   63/20 = 63 × 18/20 × 18 = 1134/360
4. Subtract the two like fractions:
   35/360 - 1134/360 = 35 - 1134/360 = -1099/360

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