Add 70/28 and 72/80
1st number: 2 14/28, 2nd number: 72/80
70/28 + 72/80 is 17/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 28 × 20 = 560,
70/28 = 70 × 20/28 × 20 = 1400/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
72/80 = 72 × 7/80 × 7 = 504/560 - Add the two like fractions:
1400/560 + 504/560 = 1400 + 504/560 = 1904/560 - 1904/560 simplified gives 17/5
- So, 70/28 + 72/80 = 17/5
In mixed form: 32/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/56+72/80 70/84+72/80