Answers

Subtract 70/21 from 56/18

1^st number: 3 2/18, 2^nd number: 3 7/21

56/18 - 70/21 is -2/9.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 21 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 18 × 7 = 126,
   56/18 = 56 × 7/18 × 7 = 392/126
3. Likewise, for the 2nd fraction, since 21 × 6 = 126,
   70/21 = 70 × 6/21 × 6 = 420/126
4. Subtract the two like fractions:
   392/126 - 420/126 = 392 - 420/126 = -28/126
5. After reducing the fraction, the answer is -2/9

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