Compare 20/28 and 70/90
20/28 is smaller than 70/90
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 90 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 28 × 45 = 1260,
20/28 = 20 × 45/28 × 45 = 900/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
70/90 = 70 × 14/90 × 14 = 980/1260 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 900/1260 < 980/1260 or 20/28 < 70/90
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