Solutions by everydaycalculation.com

721 is greater than 2170

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

LCM of 21 and 70 is**210**

Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,

721 = 7 × 1021 × 10 = 70210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,

2170 = 21 × 370 × 3 = 63210 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 70210 > 63210 or 721 > 2170

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