Subtract 20/45 from 30/7
1st number: 4 2/7, 2nd number: 20/45
30/7 - 20/45 is 242/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 7 × 45 = 315,
30/7 = 30 × 45/7 × 45 = 1350/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
20/45 = 20 × 7/45 × 7 = 140/315 - Subtract the two like fractions:
1350/315 - 140/315 = 1350 - 140/315 = 1210/315 - After reducing the fraction, the answer is 242/63
- In mixed form: 353/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/7-20/45 30/7-40/45 30/14-20/45 30/7-20/90 90/7-20/45 30/7-60/45 30/21-20/45 30/35-20/45 30/49-20/45