Add 40/28 and 90/80
1st number: 1 12/28, 2nd number: 1 10/80
40/28 + 90/80 is 143/56.
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,
40/28 = 40 × 20/28 × 20 = 800/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
90/80 = 90 × 7/80 × 7 = 630/560 - Add the two like fractions:
800/560 + 630/560 = 800 + 630/560 = 1430/560 - 1430/560 simplified gives 143/56
- So, 40/28 + 90/80 = 143/56
In mixed form: 231/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/28+90/80 40/56+90/80 40/84+90/80