Compare 21/63 and 7/90
21/63 is greater than 7/90
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
21/63 = 21 × 10/63 × 10 = 210/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
7/90 = 7 × 7/90 × 7 = 49/630 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 210/630 > 49/630 or 21/63 > 7/90
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