Add 21/60 and 45/8
1st number: 21/60, 2nd number: 5 5/8
21/60 + 45/8 is 239/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 8 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 60 × 2 = 120,
21/60 = 21 × 2/60 × 2 = 42/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
45/8 = 45 × 15/8 × 15 = 675/120 - Add the two like fractions:
42/120 + 675/120 = 42 + 675/120 = 717/120 - 717/120 simplified gives 239/40
- So, 21/60 + 45/8 = 239/40
In mixed form: 539/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/60+45/8 21/60+90/8 21/60+45/16 63/60+45/8 21/60+45/24 21/60+45/40 21/60+45/56