Compare 84/45 and 21/72
1st number: 1 39/45, 2nd number: 21/72
84/45 is greater than 21/72
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
84/45 = 84 × 8/45 × 8 = 672/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
21/72 = 21 × 5/72 × 5 = 105/360 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 672/360 > 105/360 or 84/45 > 21/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/45 and 42/72 84/90 and 21/72 84/45 and 63/72