Answers

Subtract 45/84 from 42/10

1^st number: 4 2/10, 2^nd number: 45/84

42/10 - 45/84 is 513/140.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 10 and 84 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 10 × 42 = 420,
   42/10 = 42 × 42/10 × 42 = 1764/420
3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
   45/84 = 45 × 5/84 × 5 = 225/420
4. Subtract the two like fractions:
   1764/420 - 225/420 = 1764 - 225/420 = 1539/420
5. After reducing the fraction, the answer is 513/140
6. In mixed form: 393/140

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