Compare 21/70 and 20/63
21/70 is smaller than 20/63
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
21/70 = 21 × 9/70 × 9 = 189/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
20/63 = 20 × 10/63 × 10 = 200/630 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 189/630 < 200/630 or 21/70 < 20/63
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