Compare 15/21 and 84/80
1st number: 15/21, 2nd number: 1 4/80
15/21 is smaller than 84/80
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 21 × 80 = 1680,
15/21 = 15 × 80/21 × 80 = 1200/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
84/80 = 84 × 21/80 × 21 = 1764/1680 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 1200/1680 < 1764/1680 or 15/21 < 84/80
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