Add 21/75 and 5/10
21/75 + 5/10 is 39/50.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 10 is 150
Next, find the equivalent fraction of both fractional numbers with denominator 150 - For the 1st fraction, since 75 × 2 = 150,
21/75 = 21 × 2/75 × 2 = 42/150 - Likewise, for the 2nd fraction, since 10 × 15 = 150,
5/10 = 5 × 15/10 × 15 = 75/150 - Add the two like fractions:
42/150 + 75/150 = 42 + 75/150 = 117/150 - 117/150 simplified gives 39/50
- So, 21/75 + 5/10 = 39/50
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/75+5/10 21/75+5/20 63/75+5/10 21/75+15/10 21/75+5/30 21/75+25/10 21/75+5/50 21/75+35/10 21/75+5/70