Compare 18/7 and 81/30
1st number: 2 4/7, 2nd number: 2 21/30
18/7 is smaller than 81/30
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 7 × 30 = 210,
18/7 = 18 × 30/7 × 30 = 540/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
81/30 = 81 × 7/30 × 7 = 567/210 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 540/210 < 567/210 or 18/7 < 81/30
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