Add 7/18 and 70/80
7/18 + 70/80 is 91/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 18 × 40 = 720,
7/18 = 7 × 40/18 × 40 = 280/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
70/80 = 70 × 9/80 × 9 = 630/720 - Add the two like fractions:
280/720 + 630/720 = 280 + 630/720 = 910/720 - 910/720 simplified gives 91/72
- So, 7/18 + 70/80 = 91/72
In mixed form: 119/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/18+70/80 7/36+70/80 21/18+70/80 7/54+70/80 35/18+70/80 7/90+70/80 49/18+70/80