Add 42/10 and 21/72
1st number: 4 2/10, 2nd number: 21/72
42/10 + 21/72 is 539/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 10 × 36 = 360,
42/10 = 42 × 36/10 × 36 = 1512/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
21/72 = 21 × 5/72 × 5 = 105/360 - Add the two like fractions:
1512/360 + 105/360 = 1512 + 105/360 = 1617/360 - 1617/360 simplified gives 539/120
- So, 42/10 + 21/72 = 539/120
In mixed form: 459/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/10+21/72 42/10+42/72 42/20+21/72 42/10+63/72 42/30+21/72 42/50+21/72 42/70+21/72