Compare 90/42 and 21/18
1st number: 2 6/42, 2nd number: 1 3/18
90/42 is greater than 21/18
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
90/42 = 90 × 3/42 × 3 = 270/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
21/18 = 21 × 7/18 × 7 = 147/126 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 270/126 > 147/126 or 90/42 > 21/18
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