Compare 21/75 and 90/80
1st number: 21/75, 2nd number: 1 10/80
21/75 is smaller than 90/80
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 80 is 1200
Next, find the equivalent fraction of both fractional numbers with denominator 1200 - For the 1st fraction, since 75 × 16 = 1200,
21/75 = 21 × 16/75 × 16 = 336/1200 - Likewise, for the 2nd fraction, since 80 × 15 = 1200,
90/80 = 90 × 15/80 × 15 = 1350/1200 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 336/1200 < 1350/1200 or 21/75 < 90/80
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