Compare 30/80 and 18/72
30/80 is greater than 18/72
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 72 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
30/80 = 30 × 9/80 × 9 = 270/720 - Likewise, for the 2nd fraction, since 72 × 10 = 720,
18/72 = 18 × 10/72 × 10 = 180/720 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 270/720 > 180/720 or 30/80 > 18/72
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