Add 5/70 and 4/80
5/70 + 4/80 is 17/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 70 × 8 = 560,
5/70 = 5 × 8/70 × 8 = 40/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
4/80 = 4 × 7/80 × 7 = 28/560 - Add the two like fractions:
40/560 + 28/560 = 40 + 28/560 = 68/560 - 68/560 simplified gives 17/140
- So, 5/70 + 4/80 = 17/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/70+4/80 5/70+8/80 15/70+4/80 5/70+12/80 25/70+4/80 5/70+20/80 35/70+4/80 5/70+28/80