Compare 42/45 and 20/7
1st number: 42/45, 2nd number: 2 6/7
42/45 is smaller than 20/7
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 7 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
42/45 = 42 × 7/45 × 7 = 294/315 - Likewise, for the 2nd fraction, since 7 × 45 = 315,
20/7 = 20 × 45/7 × 45 = 900/315 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 294/315 < 900/315 or 42/45 < 20/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/45 and 20/7 42/45 and 40/7 42/90 and 20/7 42/45 and 20/14 42/45 and 60/7 42/45 and 20/21 42/45 and 20/35 42/45 and 20/49