Answers

Subtract 42/72 from 49/20

1^st number: 2 9/20, 2^nd number: 42/72

49/20 - 42/72 is 28/15.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 72 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 20 × 18 = 360,
   49/20 = 49 × 18/20 × 18 = 882/360
3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
   42/72 = 42 × 5/72 × 5 = 210/360
4. Subtract the two like fractions:
   882/360 - 210/360 = 882 - 210/360 = 672/360
5. After reducing the fraction, the answer is 28/15
6. In mixed form: 113/15

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