Subtract 45/14 from 30/20
1st number: 1 10/20, 2nd number: 3 3/14
30/20 - 45/14 is -12/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 14 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
30/20 = 30 × 7/20 × 7 = 210/140 - Likewise, for the 2nd fraction, since 14 × 10 = 140,
45/14 = 45 × 10/14 × 10 = 450/140 - Subtract the two like fractions:
210/140 - 450/140 = 210 - 450/140 = -240/140 - After reducing the fraction, the answer is -12/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/20-45/14 30/20-90/14 30/40-45/14 30/20-45/28 90/20-45/14 30/60-45/14 30/20-45/42 30/20-45/70 30/20-45/98