Compare 70/72 and 42/81
70/72 is greater than 42/81
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 81 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 72 × 9 = 648,
70/72 = 70 × 9/72 × 9 = 630/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
42/81 = 42 × 8/81 × 8 = 336/648 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 630/648 > 336/648 or 70/72 > 42/81
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