Add 21/14 and 5/40
1st number: 1 7/14, 2nd number: 5/40
21/14 + 5/40 is 13/8.
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,
21/14 = 21 × 20/14 × 20 = 420/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
5/40 = 5 × 7/40 × 7 = 35/280 - Add the two like fractions:
420/280 + 35/280 = 420 + 35/280 = 455/280 - 455/280 simplified gives 13/8
- So, 21/14 + 5/40 = 13/8
In mixed form: 15/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14+5/40 21/14+10/40 21/28+5/40 21/14+5/80 63/14+5/40 21/14+15/40 21/42+5/40 21/14+25/40 21/70+5/40 21/14+35/40 21/98+5/40