Compare 21/49 and 84/90
21/49 is smaller than 84/90
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 90 is 4410
Next, find the equivalent fraction of both fractional numbers with denominator 4410 - For the 1st fraction, since 49 × 90 = 4410,
21/49 = 21 × 90/49 × 90 = 1890/4410 - Likewise, for the 2nd fraction, since 90 × 49 = 4410,
84/90 = 84 × 49/90 × 49 = 4116/4410 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 1890/4410 < 4116/4410 or 21/49 < 84/90
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