Add 98/90 and 70/35
1st number: 1 8/90, 2nd number: 2 0/35
98/90 + 70/35 is 139/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 35 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
98/90 = 98 × 7/90 × 7 = 686/630 - Likewise, for the 2nd fraction, since 35 × 18 = 630,
70/35 = 70 × 18/35 × 18 = 1260/630 - Add the two like fractions:
686/630 + 1260/630 = 686 + 1260/630 = 1946/630 - 1946/630 simplified gives 139/45
- So, 98/90 + 70/35 = 139/45
In mixed form: 34/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: