Compare 18/16 and 21/15
1st number: 1 2/16, 2nd number: 1 6/15
18/16 is smaller than 21/15
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 15 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 16 × 15 = 240,
18/16 = 18 × 15/16 × 15 = 270/240 - Likewise, for the 2nd fraction, since 15 × 16 = 240,
21/15 = 21 × 16/15 × 16 = 336/240 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 270/240 < 336/240 or 18/16 < 21/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/16 and 21/15 18/16 and 42/15 18/32 and 21/15 18/16 and 21/30 54/16 and 21/15 18/16 and 63/15 18/48 and 21/15 18/16 and 21/45 90/16 and 21/15 18/80 and 21/15 18/16 and 21/75