Compare 70/90 and 21/50
70/90 is greater than 21/50
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 50 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 90 × 5 = 450,
70/90 = 70 × 5/90 × 5 = 350/450 - Likewise, for the 2nd fraction, since 50 × 9 = 450,
21/50 = 21 × 9/50 × 9 = 189/450 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 350/450 > 189/450 or 70/90 > 21/50
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