Answers

Subtract 21/70 from 2/7

2/7 - 21/70 is -1/70.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 7 and 70 is 70
   
   Next, find the equivalent fraction of both fractional numbers with denominator 70
2. For the 1st fraction, since 7 × 10 = 70,
   2/7 = 2 × 10/7 × 10 = 20/70
3. Likewise, for the 2nd fraction, since 70 × 1 = 70,
   21/70 = 21 × 1/70 × 1 = 21/70
4. Subtract the two like fractions:
   20/70 - 21/70 = 20 - 21/70 = -1/70

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