Add 98/90 and 42/70
1st number: 1 8/90, 2nd number: 42/70
98/90 + 42/70 is 76/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 70 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 70 × 9 = 630,
42/70 = 42 × 9/70 × 9 = 378/630 - Add the two like fractions:
686/630 + 378/630 = 686 + 378/630 = 1064/630 - 1064/630 simplified gives 76/45
- So, 98/90 + 42/70 = 76/45
In mixed form: 131/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/90+84/70