Compare 21/80 and 63/75
21/80 is smaller than 63/75
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 75 is 1200
Next, find the equivalent fraction of both fractional numbers with denominator 1200 - For the 1st fraction, since 80 × 15 = 1200,
21/80 = 21 × 15/80 × 15 = 315/1200 - Likewise, for the 2nd fraction, since 75 × 16 = 1200,
63/75 = 63 × 16/75 × 16 = 1008/1200 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 315/1200 < 1008/1200 or 21/80 < 63/75
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