Answers

Subtract 70/21 from 2/30

1^st number: 2/30, 2^nd number: 3 7/21

2/30 - 70/21 is -49/15.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 21 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 30 × 7 = 210,
   2/30 = 2 × 7/30 × 7 = 14/210
3. Likewise, for the 2nd fraction, since 21 × 10 = 210,
   70/21 = 70 × 10/21 × 10 = 700/210
4. Subtract the two like fractions:
   14/210 - 700/210 = 14 - 700/210 = -686/210
5. After reducing the fraction, the answer is -49/15

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