Compare 18/20 and 75/80
18/20 is smaller than 75/80
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 20 × 4 = 80,
18/20 = 18 × 4/20 × 4 = 72/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
75/80 = 75 × 1/80 × 1 = 75/80 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 72/80 < 75/80 or 18/20 < 75/80
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