Add 25/40 and 18/28
25/40 + 18/28 is 71/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 28 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
25/40 = 25 × 7/40 × 7 = 175/280 - Likewise, for the 2nd fraction, since 28 × 10 = 280,
18/28 = 18 × 10/28 × 10 = 180/280 - Add the two like fractions:
175/280 + 180/280 = 175 + 180/280 = 355/280 - 355/280 simplified gives 71/56
- So, 25/40 + 18/28 = 71/56
In mixed form: 115/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/40+18/28 25/40+36/28 25/80+18/28 25/40+18/56 75/40+18/28 25/40+54/28 25/40+18/84 25/40+90/28