Compare 81/64 and 21/10
1st number: 1 17/64, 2nd number: 2 1/10
81/64 is smaller than 21/10
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 64 and 10 is 320
Next, find the equivalent fraction of both fractional numbers with denominator 320 - For the 1st fraction, since 64 × 5 = 320,
81/64 = 81 × 5/64 × 5 = 405/320 - Likewise, for the 2nd fraction, since 10 × 32 = 320,
21/10 = 21 × 32/10 × 32 = 672/320 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 405/320 < 672/320 or 81/64 < 21/10
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