Compare 21/81 and 24/80
21/81 is smaller than 24/80
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 80 is 6480
Next, find the equivalent fraction of both fractional numbers with denominator 6480 - For the 1st fraction, since 81 × 80 = 6480,
21/81 = 21 × 80/81 × 80 = 1680/6480 - Likewise, for the 2nd fraction, since 80 × 81 = 6480,
24/80 = 24 × 81/80 × 81 = 1944/6480 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 1680/6480 < 1944/6480 or 21/81 < 24/80
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