Add 50/70 and 72/80
50/70 + 72/80 is 113/70.
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,
50/70 = 50 × 8/70 × 8 = 400/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
72/80 = 72 × 7/80 × 7 = 504/560 - Add the two like fractions:
400/560 + 504/560 = 400 + 504/560 = 904/560 - 904/560 simplified gives 113/70
- So, 50/70 + 72/80 = 113/70
In mixed form: 143/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: