Add 5/70 and 18/80
5/70 + 18/80 is 83/280.
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,
18/80 = 18 × 7/80 × 7 = 126/560 - Add the two like fractions:
40/560 + 126/560 = 40 + 126/560 = 166/560 - 166/560 simplified gives 83/280
- So, 5/70 + 18/80 = 83/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/70+18/80 5/70+36/80 15/70+18/80 5/70+54/80 25/70+18/80 5/70+90/80 35/70+18/80