Answers

Subtract 72/70 from 15/30

1^st number: 15/30, 2^nd number: 1 2/70

15/30 - 72/70 is -37/70.

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,
   15/30 = 15 × 7/30 × 7 = 105/210
3. Likewise, for the 2nd fraction, since 70 × 3 = 210,
   72/70 = 72 × 3/70 × 3 = 216/210
4. Subtract the two like fractions:
   105/210 - 216/210 = 105 - 216/210 = -111/210
5. After reducing the fraction, the answer is -37/70

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