Add 21/3 and 72/40
1st number: 7 0/3, 2nd number: 1 32/40
21/3 + 72/40 is 44/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 3 × 40 = 120,
21/3 = 21 × 40/3 × 40 = 840/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
72/40 = 72 × 3/40 × 3 = 216/120 - Add the two like fractions:
840/120 + 216/120 = 840 + 216/120 = 1056/120 - 1056/120 simplified gives 44/5
- So, 21/3 + 72/40 = 44/5
In mixed form: 84/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/3+72/40 21/6+72/40 21/3+72/80 63/3+72/40 21/9+72/40 21/15+72/40