Subtract 18/70 from 40/30
1st number: 1 10/30, 2nd number: 18/70
40/30 - 18/70 is 113/105.
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,
40/30 = 40 × 7/30 × 7 = 280/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
18/70 = 18 × 3/70 × 3 = 54/210 - Subtract the two like fractions:
280/210 - 54/210 = 280 - 54/210 = 226/210 - After reducing the fraction, the answer is 113/105
- In mixed form: 18/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/30-18/70 40/30-36/70 40/60-18/70 40/30-54/70 40/90-18/70 40/30-90/70