Add 30/45 and 15/70
30/45 + 15/70 is 37/42.
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,
30/45 = 30 × 14/45 × 14 = 420/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
15/70 = 15 × 9/70 × 9 = 135/630 - Add the two like fractions:
420/630 + 135/630 = 420 + 135/630 = 555/630 - 555/630 simplified gives 37/42
- So, 30/45 + 15/70 = 37/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/45+15/70 30/45+30/70 30/90+15/70 90/45+15/70 30/45+45/70 30/45+75/70