Add 28/18 and 8/40
1st number: 1 10/18, 2nd number: 8/40
28/18 + 8/40 is 79/45.
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,
28/18 = 28 × 20/18 × 20 = 560/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
8/40 = 8 × 9/40 × 9 = 72/360 - Add the two like fractions:
560/360 + 72/360 = 560 + 72/360 = 632/360 - 632/360 simplified gives 79/45
- So, 28/18 + 8/40 = 79/45
In mixed form: 134/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/18+8/40 28/18+16/40 28/36+8/40 28/18+8/80 84/18+8/40 28/18+24/40 28/54+8/40 28/90+8/40 28/18+56/40