Add 35/80 and 42/70
35/80 + 42/70 is 83/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 70 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
35/80 = 35 × 7/80 × 7 = 245/560 - Likewise, for the 2nd fraction, since 70 × 8 = 560,
42/70 = 42 × 8/70 × 8 = 336/560 - Add the two like fractions:
245/560 + 336/560 = 245 + 336/560 = 581/560 - 581/560 simplified gives 83/80
- So, 35/80 + 42/70 = 83/80
In mixed form: 13/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/80+42/70 35/80+84/70