Compare 4/84 and 21/70
4/84 is smaller than 21/70
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 70 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
4/84 = 4 × 5/84 × 5 = 20/420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,
21/70 = 21 × 6/70 × 6 = 126/420 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 20/420 < 126/420 or 4/84 < 21/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/84 and 21/70 4/84 and 42/70 12/84 and 21/70 4/84 and 63/70 20/84 and 21/70 28/84 and 21/70