Subtract 40/7 from 9/30
1st number: 9/30, 2nd number: 5 5/7
9/30 - 40/7 is -379/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 7 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 7 × 30 = 210,
40/7 = 40 × 30/7 × 30 = 1200/210 - Subtract the two like fractions:
63/210 - 1200/210 = 63 - 1200/210 = -1137/210 - After reducing the fraction, the answer is -379/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/30-40/7 9/30-80/7 9/60-40/7 9/30-40/14 27/30-40/7 9/90-40/7 9/30-40/21 45/30-40/7 9/30-40/35 63/30-40/7 9/30-40/49