Compare 21/40 and 15/4
1st number: 21/40, 2nd number: 3 3/4
21/40 is smaller than 15/4
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 4 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
21/40 = 21 × 1/40 × 1 = 21/40 - Likewise, for the 2nd fraction, since 4 × 10 = 40,
15/4 = 15 × 10/4 × 10 = 150/40 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 21/40 < 150/40 or 21/40 < 15/4
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