Add 20/45 and 5/70
20/45 + 5/70 is 65/126.
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,
20/45 = 20 × 14/45 × 14 = 280/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
5/70 = 5 × 9/70 × 9 = 45/630 - Add the two like fractions:
280/630 + 45/630 = 280 + 45/630 = 325/630 - 325/630 simplified gives 65/126
- So, 20/45 + 5/70 = 65/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/45+5/70 20/45+10/70 20/90+5/70 60/45+5/70 20/45+15/70 20/45+25/70 20/45+35/70