Answers

Subtract 2/21 from 63/70

63/70 - 2/21 is 169/210.

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,
   63/70 = 63 × 3/70 × 3 = 189/210
3. Likewise, for the 2nd fraction, since 21 × 10 = 210,
   2/21 = 2 × 10/21 × 10 = 20/210
4. Subtract the two like fractions:
   189/210 - 20/210 = 189 - 20/210 = 169/210

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