Subtract 15/35 from 9/30
9/30 - 15/35 is -9/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 35 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
9/30 = 9 × 7/30 × 7 = 63/210 - Likewise, for the 2nd fraction, since 35 × 6 = 210,
15/35 = 15 × 6/35 × 6 = 90/210 - Subtract the two like fractions:
63/210 - 90/210 = 63 - 90/210 = -27/210 - After reducing the fraction, the answer is -9/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/30-15/35 9/30-30/35 9/60-15/35 9/30-15/70 27/30-15/35 9/30-45/35 9/90-15/35 45/30-15/35 9/30-75/35 63/30-15/35