Subtract 30/7 from 45/70
1st number: 45/70, 2nd number: 4 2/7
45/70 - 30/7 is -51/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 7 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 70 × 1 = 70,
45/70 = 45 × 1/70 × 1 = 45/70 - Likewise, for the 2nd fraction, since 7 × 10 = 70,
30/7 = 30 × 10/7 × 10 = 300/70 - Subtract the two like fractions:
45/70 - 300/70 = 45 - 300/70 = -255/70 - After reducing the fraction, the answer is -51/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/70-30/7 45/70-60/7 45/70-30/14 45/70-90/7 45/70-30/21 45/70-30/35 45/70-30/49