Compare 90/20 and 21/30
1st number: 4 10/20, 2nd number: 21/30
90/20 is greater than 21/30
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
90/20 = 90 × 3/20 × 3 = 270/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
21/30 = 21 × 2/30 × 2 = 42/60 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 270/60 > 42/60 or 90/20 > 21/30
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