Answers

Subtract 4/21 from 9/70

9/70 - 4/21 is -13/210.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 21 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 70 × 3 = 210,
   9/70 = 9 × 3/70 × 3 = 27/210
3. Likewise, for the 2nd fraction, since 21 × 10 = 210,
   4/21 = 4 × 10/21 × 10 = 40/210
4. Subtract the two like fractions:
   27/210 - 40/210 = 27 - 40/210 = -13/210

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