Answers

Subtract 15/80 from 9/70

9/70 - 15/80 is -33/560.

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,
   9/70 = 9 × 8/70 × 8 = 72/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   15/80 = 15 × 7/80 × 7 = 105/560
4. Subtract the two like fractions:
   72/560 - 105/560 = 72 - 105/560 = -33/560

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