Add 21/45 and 75/10
1st number: 21/45, 2nd number: 7 5/10
21/45 + 75/10 is 239/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
21/45 = 21 × 2/45 × 2 = 42/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
75/10 = 75 × 9/10 × 9 = 675/90 - Add the two like fractions:
42/90 + 675/90 = 42 + 675/90 = 717/90 - 717/90 simplified gives 239/30
- So, 21/45 + 75/10 = 239/30
In mixed form: 729/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/45+75/10 21/90+75/10 21/45+75/20 63/45+75/10 21/45+75/30 21/45+75/50 21/45+75/70