Add 10/40 and 21/60
10/40 + 21/60 is 3/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 60 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
10/40 = 10 × 3/40 × 3 = 30/120 - Likewise, for the 2nd fraction, since 60 × 2 = 120,
21/60 = 21 × 2/60 × 2 = 42/120 - Add the two like fractions:
30/120 + 42/120 = 30 + 42/120 = 72/120 - 72/120 simplified gives 3/5
- So, 10/40 + 21/60 = 3/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/40+21/60 10/40+42/60 10/80+21/60 30/40+21/60 10/40+63/60 50/40+21/60 70/40+21/60