Add 5/40 and 4/21
5/40 + 4/21 is 53/168.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 21 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
5/40 = 5 × 21/40 × 21 = 105/840 - Likewise, for the 2nd fraction, since 21 × 40 = 840,
4/21 = 4 × 40/21 × 40 = 160/840 - Add the two like fractions:
105/840 + 160/840 = 105 + 160/840 = 265/840 - 265/840 simplified gives 53/168
- So, 5/40 + 4/21 = 53/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/40+4/21 5/40+8/21 5/80+4/21 5/40+4/42 15/40+4/21 5/40+12/21 5/40+4/63 25/40+4/21 5/40+20/21 35/40+4/21 5/40+28/21