Compare 42/45 and 21/10
1st number: 42/45, 2nd number: 2 1/10
42/45 is smaller than 21/10
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
42/45 = 42 × 2/45 × 2 = 84/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
21/10 = 21 × 9/10 × 9 = 189/90 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 84/90 < 189/90 or 42/45 < 21/10
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