Compare 81/42 and 18/72
1st number: 1 39/42, 2nd number: 18/72
81/42 is greater than 18/72
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 42 × 12 = 504,
81/42 = 81 × 12/42 × 12 = 972/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
18/72 = 18 × 7/72 × 7 = 126/504 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 972/504 > 126/504 or 81/42 > 18/72
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