Answers

Subtract 21/30 from 70/21

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

70/21 - 21/30 is 79/30.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 30 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 21 × 10 = 210,
   70/21 = 70 × 10/21 × 10 = 700/210
3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
   21/30 = 21 × 7/30 × 7 = 147/210
4. Subtract the two like fractions:
   700/210 - 147/210 = 700 - 147/210 = 553/210
5. After reducing the fraction, the answer is 79/30
6. In mixed form: 219/30

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