Add 90/14 and 15/40
1st number: 6 6/14, 2nd number: 15/40
90/14 + 15/40 is 381/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 14 × 20 = 280,
90/14 = 90 × 20/14 × 20 = 1800/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
15/40 = 15 × 7/40 × 7 = 105/280 - Add the two like fractions:
1800/280 + 105/280 = 1800 + 105/280 = 1905/280 - 1905/280 simplified gives 381/56
- So, 90/14 + 15/40 = 381/56
In mixed form: 645/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/14+30/40 90/28+15/40 90/14+15/80 90/14+45/40 90/42+15/40 90/14+75/40 90/70+15/40 90/98+15/40