Subtract 20/14 from 30/45
1st number: 30/45, 2nd number: 1 6/14
30/45 - 20/14 is -16/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 14 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
30/45 = 30 × 14/45 × 14 = 420/630 - Likewise, for the 2nd fraction, since 14 × 45 = 630,
20/14 = 20 × 45/14 × 45 = 900/630 - Subtract the two like fractions:
420/630 - 900/630 = 420 - 900/630 = -480/630 - After reducing the fraction, the answer is -16/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/45-20/14 30/45-40/14 30/90-20/14 30/45-20/28 90/45-20/14 30/45-60/14 30/45-20/42 30/45-20/70 30/45-20/98