Compare 42/40 and 21/70
1st number: 1 2/40, 2nd number: 21/70
42/40 is greater than 21/70
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 70 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
42/40 = 42 × 7/40 × 7 = 294/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
21/70 = 21 × 4/70 × 4 = 84/280 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 294/280 > 84/280 or 42/40 > 21/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/40 and 21/70 42/40 and 42/70 42/80 and 21/70 42/40 and 63/70