Compare 20/90 and 5/7
20/90 is smaller than 5/7
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 7 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
20/90 = 20 × 7/90 × 7 = 140/630 - Likewise, for the 2nd fraction, since 7 × 90 = 630,
5/7 = 5 × 90/7 × 90 = 450/630 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 140/630 < 450/630 or 20/90 < 5/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/90 and 5/7 20/90 and 10/7 20/90 and 5/14 60/90 and 5/7 20/90 and 15/7 20/90 and 5/21 20/90 and 25/7 20/90 and 5/35 20/90 and 35/7 20/90 and 5/49