Add 40/50 and 15/80
40/50 + 15/80 is 79/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 80 is 400
Next, find the equivalent fraction of both fractional numbers with denominator 400 - For the 1st fraction, since 50 × 8 = 400,
40/50 = 40 × 8/50 × 8 = 320/400 - Likewise, for the 2nd fraction, since 80 × 5 = 400,
15/80 = 15 × 5/80 × 5 = 75/400 - Add the two like fractions:
320/400 + 75/400 = 320 + 75/400 = 395/400 - 395/400 simplified gives 79/80
- So, 40/50 + 15/80 = 79/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/50+15/80 40/50+30/80 40/50+45/80 40/50+75/80