Compare 40/42 and 12/45
40/42 is greater than 12/45
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
40/42 = 40 × 15/42 × 15 = 600/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
12/45 = 12 × 14/45 × 14 = 168/630 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 600/630 > 168/630 or 40/42 > 12/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/42 and 12/45 40/42 and 24/45 40/84 and 12/45 40/42 and 12/90 40/42 and 36/45 40/42 and 60/45 40/42 and 84/45