Compare 90/70 and 42/40
1st number: 1 20/70, 2nd number: 1 2/40
90/70 is greater than 42/40
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 70 × 4 = 280,
90/70 = 90 × 4/70 × 4 = 360/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
42/40 = 42 × 7/40 × 7 = 294/280 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 360/280 > 294/280 or 90/70 > 42/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/70 and 84/40 90/70 and 42/80