Add 10/70 and 90/45
1st number: 10/70, 2nd number: 2 0/45
10/70 + 90/45 is 15/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
10/70 = 10 × 9/70 × 9 = 90/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
90/45 = 90 × 14/45 × 14 = 1260/630 - Add the two like fractions:
90/630 + 1260/630 = 90 + 1260/630 = 1350/630 - 1350/630 simplified gives 15/7
- So, 10/70 + 90/45 = 15/7
In mixed form: 21/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/70+90/45 30/70+90/45 50/70+90/45