Add 30/70 and 5/90
30/70 + 5/90 is 61/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 90 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 90 × 7 = 630,
5/90 = 5 × 7/90 × 7 = 35/630 - Add the two like fractions:
270/630 + 35/630 = 270 + 35/630 = 305/630 - 305/630 simplified gives 61/126
- So, 30/70 + 5/90 = 61/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/70+5/90 30/70+10/90 90/70+5/90 30/70+15/90 30/70+25/90 30/70+35/90