Compare 21/90 and 3/72
21/90 is greater than 3/72
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
21/90 = 21 × 4/90 × 4 = 84/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
3/72 = 3 × 5/72 × 5 = 15/360 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 84/360 > 15/360 or 21/90 > 3/72
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