Compare 15/80 and 21/36
15/80 is smaller than 21/36
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 36 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
15/80 = 15 × 9/80 × 9 = 135/720 - Likewise, for the 2nd fraction, since 36 × 20 = 720,
21/36 = 21 × 20/36 × 20 = 420/720 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 135/720 < 420/720 or 15/80 < 21/36
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