Compare 20/72 and 20/90
20/72 is greater than 20/90
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
20/72 = 20 × 5/72 × 5 = 100/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
20/90 = 20 × 4/90 × 4 = 80/360 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 100/360 > 80/360 or 20/72 > 20/90
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