Subtract 15/70 from 9/54
9/54 - 15/70 is -1/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 70 is 1890
Next, find the equivalent fraction of both fractional numbers with denominator 1890 - For the 1st fraction, since 54 × 35 = 1890,
9/54 = 9 × 35/54 × 35 = 315/1890 - Likewise, for the 2nd fraction, since 70 × 27 = 1890,
15/70 = 15 × 27/70 × 27 = 405/1890 - Subtract the two like fractions:
315/1890 - 405/1890 = 315 - 405/1890 = -90/1890 - After reducing the fraction, the answer is -1/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/54-15/70 9/54-30/70 27/54-15/70 9/54-45/70 45/54-15/70 9/54-75/70 63/54-15/70