Subtract 70/18 from 1/30
1st number: 1/30, 2nd number: 3 16/18
1/30 - 70/18 is -347/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
1/30 = 1 × 3/30 × 3 = 3/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
70/18 = 70 × 5/18 × 5 = 350/90 - Subtract the two like fractions:
3/90 - 350/90 = 3 - 350/90 = -347/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/30-70/18 1/60-70/18 1/30-70/36 3/30-70/18 1/90-70/18 1/30-70/54 5/30-70/18 1/30-70/90 7/30-70/18