Answers

Subtract 70/25 from 21/30

1^st number: 21/30, 2^nd number: 2 20/25

21/30 - 70/25 is -21/10.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 25 is 150
   
   Next, find the equivalent fraction of both fractional numbers with denominator 150
2. For the 1st fraction, since 30 × 5 = 150,
   21/30 = 21 × 5/30 × 5 = 105/150
3. Likewise, for the 2nd fraction, since 25 × 6 = 150,
   70/25 = 70 × 6/25 × 6 = 420/150
4. Subtract the two like fractions:
   105/150 - 420/150 = 105 - 420/150 = -315/150
5. After reducing the fraction, the answer is -21/10

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