Answers

Subtract 18/72 from 42/30

1^st number: 1 12/30, 2^nd number: 18/72

42/30 - 18/72 is 23/20.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 72 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 30 × 12 = 360,
   42/30 = 42 × 12/30 × 12 = 504/360
3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
   18/72 = 18 × 5/72 × 5 = 90/360
4. Subtract the two like fractions:
   504/360 - 90/360 = 504 - 90/360 = 414/360
5. After reducing the fraction, the answer is 23/20
6. In mixed form: 13/20

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