Answers

Subtract 42/80 from 84/18

1^st number: 4 12/18, 2^nd number: 42/80

84/18 - 42/80 is 497/120.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 80 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 18 × 40 = 720,
   84/18 = 84 × 40/18 × 40 = 3360/720
3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
   42/80 = 42 × 9/80 × 9 = 378/720
4. Subtract the two like fractions:
   3360/720 - 378/720 = 3360 - 378/720 = 2982/720
5. After reducing the fraction, the answer is 497/120
6. In mixed form: 417/120

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