Add 14/40 and 45/70
14/40 + 45/70 is 139/140.
Steps for adding 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,
14/40 = 14 × 7/40 × 7 = 98/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
45/70 = 45 × 4/70 × 4 = 180/280 - Add the two like fractions:
98/280 + 180/280 = 98 + 180/280 = 278/280 - 278/280 simplified gives 139/140
- So, 14/40 + 45/70 = 139/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/40+45/70 14/40+90/70 14/80+45/70 42/40+45/70 70/40+45/70 98/40+45/70