Answers

Subtract 72/80 from 42/2

1^st number: 21 0/2, 2^nd number: 72/80

42/2 - 72/80 is 201/10.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 2 and 80 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 2 × 40 = 80,
   42/2 = 42 × 40/2 × 40 = 1680/80
3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
   72/80 = 72 × 1/80 × 1 = 72/80
4. Subtract the two like fractions:
   1680/80 - 72/80 = 1680 - 72/80 = 1608/80
5. After reducing the fraction, the answer is 201/10
6. In mixed form: 201/10

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