Compare 18/72 and 21/7
1st number: 18/72, 2nd number: 3 0/7
18/72 is smaller than 21/7
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 7 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
18/72 = 18 × 7/72 × 7 = 126/504 - Likewise, for the 2nd fraction, since 7 × 72 = 504,
21/7 = 21 × 72/7 × 72 = 1512/504 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 126/504 < 1512/504 or 18/72 < 21/7
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