Add 30/70 and 18/45
30/70 + 18/45 is 29/35.
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,
30/70 = 30 × 9/70 × 9 = 270/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
18/45 = 18 × 14/45 × 14 = 252/630 - Add the two like fractions:
270/630 + 252/630 = 270 + 252/630 = 522/630 - 522/630 simplified gives 29/35
- So, 30/70 + 18/45 = 29/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/70+18/45 30/70+36/45 30/70+18/90 90/70+18/45 30/70+54/45 30/70+90/45