Solutions by everydaycalculation.com

621 is smaller than 2572

- Find the least common denominator or LCM of the two denominators:

LCM of 21 and 72 is**504**

Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 21 × 24 = 504,

621 = 6 × 2421 × 24 = 144504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,

2572 = 25 × 772 × 7 = 175504 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 144504 < 175504 or 621 < 2572

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