Add 27/70 and 1/90
27/70 + 1/90 is 25/63.
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,
27/70 = 27 × 9/70 × 9 = 243/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
1/90 = 1 × 7/90 × 7 = 7/630 - Add the two like fractions:
243/630 + 7/630 = 243 + 7/630 = 250/630 - 250/630 simplified gives 25/63
- So, 27/70 + 1/90 = 25/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/70+1/90 27/70+2/90 81/70+1/90 27/70+3/90 27/70+5/90 27/70+7/90