Add 9/18 and 15/40
9/18 + 15/40 is 7/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 18 × 20 = 360,
9/18 = 9 × 20/18 × 20 = 180/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
15/40 = 15 × 9/40 × 9 = 135/360 - Add the two like fractions:
180/360 + 135/360 = 180 + 135/360 = 315/360 - 315/360 simplified gives 7/8
- So, 9/18 + 15/40 = 7/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 9/18+30/40 9/36+15/40 9/18+15/80 27/18+15/40 9/18+45/40 9/54+15/40 45/18+15/40 9/18+75/40 9/90+15/40 63/18+15/40