Answers

Subtract 70/84 from 20/75

20/75 - 70/84 is -17/30.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 75 and 84 is 2100
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2100
2. For the 1st fraction, since 75 × 28 = 2100,
   20/75 = 20 × 28/75 × 28 = 560/2100
3. Likewise, for the 2nd fraction, since 84 × 25 = 2100,
   70/84 = 70 × 25/84 × 25 = 1750/2100
4. Subtract the two like fractions:
   560/2100 - 1750/2100 = 560 - 1750/2100 = -1190/2100
5. After reducing the fraction, the answer is -17/30

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