Add 18/40 and 36/84
18/40 + 36/84 is 123/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 84 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
18/40 = 18 × 21/40 × 21 = 378/840 - Likewise, for the 2nd fraction, since 84 × 10 = 840,
36/84 = 36 × 10/84 × 10 = 360/840 - Add the two like fractions:
378/840 + 360/840 = 378 + 360/840 = 738/840 - 738/840 simplified gives 123/140
- So, 18/40 + 36/84 = 123/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/40+36/84 18/40+72/84 18/80+36/84 54/40+36/84 90/40+36/84