Subtract 12/30 from 70/20
1st number: 3 10/20, 2nd number: 12/30
70/20 - 12/30 is 31/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 30 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 30 × 2 = 60,
12/30 = 12 × 2/30 × 2 = 24/60 - Subtract the two like fractions:
210/60 - 24/60 = 210 - 24/60 = 186/60 - After reducing the fraction, the answer is 31/10
- In mixed form: 31/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/20-24/30 70/40-12/30 70/20-12/60 70/20-36/30 70/60-12/30 70/20-12/90 70/20-60/30 70/20-84/30