Compare 21/63 and 18/70
21/63 is greater than 18/70
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 70 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 70 × 9 = 630,
18/70 = 18 × 9/70 × 9 = 162/630 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 210/630 > 162/630 or 21/63 > 18/70
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