Add 45/28 and 20/80
1st number: 1 17/28, 2nd number: 20/80
45/28 + 20/80 is 13/7.
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,
45/28 = 45 × 20/28 × 20 = 900/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
20/80 = 20 × 7/80 × 7 = 140/560 - Add the two like fractions:
900/560 + 140/560 = 900 + 140/560 = 1040/560 - 1040/560 simplified gives 13/7
- So, 45/28 + 20/80 = 13/7
In mixed form: 16/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/28+20/80 45/28+40/80 45/56+20/80 45/28+60/80 45/84+20/80