Add 80/45 and 90/70
1st number: 1 35/45, 2nd number: 1 20/70
80/45 + 90/70 is 193/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
80/45 = 80 × 14/45 × 14 = 1120/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
90/70 = 90 × 9/70 × 9 = 810/630 - Add the two like fractions:
1120/630 + 810/630 = 1120 + 810/630 = 1930/630 - 1930/630 simplified gives 193/63
- So, 80/45 + 90/70 = 193/63
In mixed form: 34/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/90+90/70