Compare 40/45 and 42/30
1st number: 40/45, 2nd number: 1 12/30
40/45 is smaller than 42/30
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
40/45 = 40 × 2/45 × 2 = 80/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
42/30 = 42 × 3/30 × 3 = 126/90 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 80/90 < 126/90 or 40/45 < 42/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/45 and 42/30 40/45 and 84/30 40/90 and 42/30 40/45 and 42/60 40/45 and 42/90