Compare 4/28 and 21/30
4/28 is smaller than 21/30
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
4/28 = 4 × 15/28 × 15 = 60/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
21/30 = 21 × 14/30 × 14 = 294/420 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 60/420 < 294/420 or 4/28 < 21/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/28 and 21/30 4/28 and 42/30 4/56 and 21/30 4/28 and 21/60 12/28 and 21/30 4/28 and 63/30 4/84 and 21/30 4/28 and 21/90 20/28 and 21/30