Add 18/90 and 27/42
18/90 + 27/42 is 59/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
18/90 = 18 × 7/90 × 7 = 126/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
27/42 = 27 × 15/42 × 15 = 405/630 - Add the two like fractions:
126/630 + 405/630 = 126 + 405/630 = 531/630 - 531/630 simplified gives 59/70
- So, 18/90 + 27/42 = 59/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/90+27/42 18/90+54/42 18/90+27/84 54/90+27/42 18/90+81/42