Answers

Subtract 15/70 from 20/84

20/84 - 15/70 is 1/42.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 70 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 70 × 6 = 420,
   15/70 = 15 × 6/70 × 6 = 90/420
4. Subtract the two like fractions:
   100/420 - 90/420 = 100 - 90/420 = 10/420
5. After reducing the fraction, the answer is 1/42

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