Compare 90/16 and 72/21
1st number: 5 10/16, 2nd number: 3 9/21
90/16 is greater than 72/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 21 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 16 × 21 = 336,
90/16 = 90 × 21/16 × 21 = 1890/336 - Likewise, for the 2nd fraction, since 21 × 16 = 336,
72/21 = 72 × 16/21 × 16 = 1152/336 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 1890/336 > 1152/336 or 90/16 > 72/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/32 and 72/21 90/16 and 72/42 90/48 and 72/21 90/16 and 72/63 90/80 and 72/21