Add 18/84 and 3/40
18/84 + 3/40 is 81/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 84 × 10 = 840,
18/84 = 18 × 10/84 × 10 = 180/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
3/40 = 3 × 21/40 × 21 = 63/840 - Add the two like fractions:
180/840 + 63/840 = 180 + 63/840 = 243/840 - 243/840 simplified gives 81/280
- So, 18/84 + 3/40 = 81/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/84+3/40 18/84+6/40 18/84+3/80 54/84+3/40 18/84+9/40 90/84+3/40 18/84+15/40 18/84+21/40