Compare 21/72 and 2/42
21/72 is greater than 2/42
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 42 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
21/72 = 21 × 7/72 × 7 = 147/504 - Likewise, for the 2nd fraction, since 42 × 12 = 504,
2/42 = 2 × 12/42 × 12 = 24/504 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 147/504 > 24/504 or 21/72 > 2/42
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