Add 14/90 and 20/42
14/90 + 20/42 is 199/315.
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,
14/90 = 14 × 7/90 × 7 = 98/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
20/42 = 20 × 15/42 × 15 = 300/630 - Add the two like fractions:
98/630 + 300/630 = 98 + 300/630 = 398/630 - 398/630 simplified gives 199/315
- So, 14/90 + 20/42 = 199/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/90+20/42 14/90+40/42 14/90+20/84 42/90+20/42 14/90+60/42 70/90+20/42 98/90+20/42