Compare 20/21 and 90/75
1st number: 20/21, 2nd number: 1 15/75
20/21 is smaller than 90/75
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 75 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 21 × 25 = 525,
20/21 = 20 × 25/21 × 25 = 500/525 - Likewise, for the 2nd fraction, since 75 × 7 = 525,
90/75 = 90 × 7/75 × 7 = 630/525 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 500/525 < 630/525 or 20/21 < 90/75
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21 and 90/75 20/42 and 90/75 60/21 and 90/75 20/63 and 90/75