Compare 18/21 and 90/10
1st number: 18/21, 2nd number: 9 0/10
18/21 is smaller than 90/10
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
18/21 = 18 × 10/21 × 10 = 180/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
90/10 = 90 × 21/10 × 21 = 1890/210 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 180/210 < 1890/210 or 18/21 < 90/10
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