Compare 40/21 and 84/7
1st number: 1 19/21, 2nd number: 12 0/7
40/21 is smaller than 84/7
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 7 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 21 × 1 = 21,
40/21 = 40 × 1/21 × 1 = 40/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
84/7 = 84 × 3/7 × 3 = 252/21 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 40/21 < 252/21 or 40/21 < 84/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/21 and 84/7 40/42 and 84/7 40/21 and 84/14 40/63 and 84/7 40/21 and 84/21 40/21 and 84/35 40/21 and 84/49