Answers

Subtract 75/10 from 20/84

1^st number: 20/84, 2^nd number: 7 5/10

20/84 - 75/10 is -305/42.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 10 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 84 × 5 = 420,
   20/84 = 20 × 5/84 × 5 = 100/420
3. Likewise, for the 2nd fraction, since 10 × 42 = 420,
   75/10 = 75 × 42/10 × 42 = 3150/420
4. Subtract the two like fractions:
   100/420 - 3150/420 = 100 - 3150/420 = -3050/420
5. After reducing the fraction, the answer is -305/42

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