Compare 18/21 and 45/30
1st number: 18/21, 2nd number: 1 15/30
18/21 is smaller than 45/30
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
18/21 = 18 × 10/21 × 10 = 180/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
45/30 = 45 × 7/30 × 7 = 315/210 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 180/210 < 315/210 or 18/21 < 45/30
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