Subtract 4/70 from 18/30
18/30 - 4/70 is 19/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
18/30 = 18 × 7/30 × 7 = 126/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
4/70 = 4 × 3/70 × 3 = 12/210 - Subtract the two like fractions:
126/210 - 12/210 = 126 - 12/210 = 114/210 - After reducing the fraction, the answer is 19/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/30-4/70 18/30-8/70 18/60-4/70 54/30-4/70 18/30-12/70 18/90-4/70 90/30-4/70 18/30-20/70 18/30-28/70