Compare 90/6 and 40/21
1st number: 15 0/6, 2nd number: 1 19/21
90/6 is greater than 40/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
90/6 = 90 × 7/6 × 7 = 630/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
40/21 = 40 × 2/21 × 2 = 80/42 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 630/42 > 80/42 or 90/6 > 40/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/6 and 80/21 90/12 and 40/21 90/6 and 40/42 90/18 and 40/21 90/6 and 40/63 90/30 and 40/21 90/42 and 40/21