Compare 21/90 and 5/64
21/90 is greater than 5/64
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 64 is 2880
Next, find the equivalent fraction of both fractional numbers with denominator 2880 - For the 1st fraction, since 90 × 32 = 2880,
21/90 = 21 × 32/90 × 32 = 672/2880 - Likewise, for the 2nd fraction, since 64 × 45 = 2880,
5/64 = 5 × 45/64 × 45 = 225/2880 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 672/2880 > 225/2880 or 21/90 > 5/64
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