Compare 90/18 and 21/8
1st number: 5 0/18, 2nd number: 2 5/8
90/18 is greater than 21/8
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 18 × 4 = 72,
90/18 = 90 × 4/18 × 4 = 360/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
21/8 = 21 × 9/8 × 9 = 189/72 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 360/72 > 189/72 or 90/18 > 21/8
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