Subtract 18/12 from 70/20
1st number: 3 10/20, 2nd number: 1 6/12
70/20 - 18/12 is 2/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
70/20 = 70 × 3/20 × 3 = 210/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
18/12 = 18 × 5/12 × 5 = 90/60 - Subtract the two like fractions:
210/60 - 90/60 = 210 - 90/60 = 120/60 - After reducing the fraction, the answer is 2/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/20-36/12 70/40-18/12 70/20-18/24 70/20-54/12 70/60-18/12 70/20-18/36 70/20-90/12 70/20-18/60 70/20-18/84