Subtract 15/70 from 45/30
1st number: 1 15/30, 2nd number: 15/70
45/30 - 15/70 is 9/7.
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,
45/30 = 45 × 7/30 × 7 = 315/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
15/70 = 15 × 3/70 × 3 = 45/210 - Subtract the two like fractions:
315/210 - 45/210 = 315 - 45/210 = 270/210 - After reducing the fraction, the answer is 9/7
- In mixed form: 12/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/30-15/70 45/30-30/70 45/60-15/70 45/30-45/70 45/90-15/70 45/30-75/70