Add 21/50 and 4/80
21/50 + 4/80 is 47/100.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 80 is 400
Next, find the equivalent fraction of both fractional numbers with denominator 400 - For the 1st fraction, since 50 × 8 = 400,
21/50 = 21 × 8/50 × 8 = 168/400 - Likewise, for the 2nd fraction, since 80 × 5 = 400,
4/80 = 4 × 5/80 × 5 = 20/400 - Add the two like fractions:
168/400 + 20/400 = 168 + 20/400 = 188/400 - 188/400 simplified gives 47/100
- So, 21/50 + 4/80 = 47/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/50+4/80 21/50+8/80 63/50+4/80 21/50+12/80 21/50+20/80 21/50+28/80