Answers

Subtract 63/70 from 20/30

20/30 - 63/70 is -7/30.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 70 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 30 × 7 = 210,
   20/30 = 20 × 7/30 × 7 = 140/210
3. Likewise, for the 2nd fraction, since 70 × 3 = 210,
   63/70 = 63 × 3/70 × 3 = 189/210
4. Subtract the two like fractions:
   140/210 - 189/210 = 140 - 189/210 = -49/210
5. After reducing the fraction, the answer is -7/30

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