Compare 18/10 and 28/21
1st number: 1 8/10, 2nd number: 1 7/21
18/10 is greater than 28/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
18/10 = 18 × 21/10 × 21 = 378/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
28/21 = 28 × 10/21 × 10 = 280/210 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 378/210 > 280/210 or 18/10 > 28/21
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