Answers

Subtract 12/80 from 7/70

7/70 - 12/80 is -1/20.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 80 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 70 × 8 = 560,
   7/70 = 7 × 8/70 × 8 = 56/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   12/80 = 12 × 7/80 × 7 = 84/560
4. Subtract the two like fractions:
   56/560 - 84/560 = 56 - 84/560 = -28/560
5. After reducing the fraction, the answer is -1/20

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