Compare 21/40 and 4/45
21/40 is greater than 4/45
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 45 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
21/40 = 21 × 9/40 × 9 = 189/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
4/45 = 4 × 8/45 × 8 = 32/360 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 189/360 > 32/360 or 21/40 > 4/45
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