Add 28/70 and 6/80
28/70 + 6/80 is 19/40.
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,
28/70 = 28 × 8/70 × 8 = 224/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
6/80 = 6 × 7/80 × 7 = 42/560 - Add the two like fractions:
224/560 + 42/560 = 224 + 42/560 = 266/560 - 266/560 simplified gives 19/40
- So, 28/70 + 6/80 = 19/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/70+6/80 28/70+12/80 84/70+6/80 28/70+18/80 28/70+30/80 28/70+42/80