Add 70/80 and 98/90
1st number: 70/80, 2nd number: 1 8/90
70/80 + 98/90 is 707/360.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 90 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
70/80 = 70 × 9/80 × 9 = 630/720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,
98/90 = 98 × 8/90 × 8 = 784/720 - Add the two like fractions:
630/720 + 784/720 = 630 + 784/720 = 1414/720 - 1414/720 simplified gives 707/360
- So, 70/80 + 98/90 = 707/360
In mixed form: 1347/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: