Subtract 90/30 from 40/14
1st number: 2 12/14, 2nd number: 3 0/30
40/14 - 90/30 is -1/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 14 × 15 = 210,
40/14 = 40 × 15/14 × 15 = 600/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
90/30 = 90 × 7/30 × 7 = 630/210 - Subtract the two like fractions:
600/210 - 630/210 = 600 - 630/210 = -30/210 - After reducing the fraction, the answer is -1/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/14-90/30 40/28-90/30 40/14-90/60 40/42-90/30 40/70-90/30 40/98-90/30