Subtract 15/45 from 70/20
1st number: 3 10/20, 2nd number: 15/45
70/20 - 15/45 is 19/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
70/20 = 70 × 9/20 × 9 = 630/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
15/45 = 15 × 4/45 × 4 = 60/180 - Subtract the two like fractions:
630/180 - 60/180 = 630 - 60/180 = 570/180 - After reducing the fraction, the answer is 19/6
- In mixed form: 31/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/20-30/45 70/40-15/45 70/20-15/90 70/60-15/45 70/20-75/45