Compare 70/81 and 21/30
70/81 is greater than 21/30
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 30 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 81 × 10 = 810,
70/81 = 70 × 10/81 × 10 = 700/810 - Likewise, for the 2nd fraction, since 30 × 27 = 810,
21/30 = 21 × 27/30 × 27 = 567/810 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 700/810 > 567/810 or 70/81 > 21/30
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