Compare 21/90 and 42/4
1st number: 21/90, 2nd number: 10 2/4
21/90 is smaller than 42/4
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 4 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
21/90 = 21 × 2/90 × 2 = 42/180 - Likewise, for the 2nd fraction, since 4 × 45 = 180,
42/4 = 42 × 45/4 × 45 = 1890/180 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 42/180 < 1890/180 or 21/90 < 42/4
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