Compare 20/90 and 21/20
1st number: 20/90, 2nd number: 1 1/20
20/90 is smaller than 21/20
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
20/90 = 20 × 2/90 × 2 = 40/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
21/20 = 21 × 9/20 × 9 = 189/180 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 40/180 < 189/180 or 20/90 < 21/20
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