Add 8/40 and 28/30
8/40 + 28/30 is 17/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 30 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
8/40 = 8 × 3/40 × 3 = 24/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
28/30 = 28 × 4/30 × 4 = 112/120 - Add the two like fractions:
24/120 + 112/120 = 24 + 112/120 = 136/120 - 136/120 simplified gives 17/15
- So, 8/40 + 28/30 = 17/15
In mixed form: 12/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/40+28/30 8/40+56/30 8/80+28/30 8/40+28/60 24/40+28/30 8/40+84/30 8/40+28/90 56/40+28/30