Add 21/8 and 12/60
1st number: 2 5/8, 2nd number: 12/60
21/8 + 12/60 is 113/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 60 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 8 × 15 = 120,
21/8 = 21 × 15/8 × 15 = 315/120 - Likewise, for the 2nd fraction, since 60 × 2 = 120,
12/60 = 12 × 2/60 × 2 = 24/120 - Add the two like fractions:
315/120 + 24/120 = 315 + 24/120 = 339/120 - 339/120 simplified gives 113/40
- So, 21/8 + 12/60 = 113/40
In mixed form: 233/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/8+12/60 21/8+24/60 21/16+12/60 63/8+12/60 21/8+36/60 21/24+12/60 21/40+12/60 21/8+84/60 21/56+12/60