Compare 15/21 and 18/35
15/21 is greater than 18/35
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 35 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
15/21 = 15 × 5/21 × 5 = 75/105 - Likewise, for the 2nd fraction, since 35 × 3 = 105,
18/35 = 18 × 3/35 × 3 = 54/105 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 75/105 > 54/105 or 15/21 > 18/35
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