Add 81/20 and 4/30
1st number: 4 1/20, 2nd number: 4/30
81/20 + 4/30 is 251/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
81/20 = 81 × 3/20 × 3 = 243/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
4/30 = 4 × 2/30 × 2 = 8/60 - Add the two like fractions:
243/60 + 8/60 = 243 + 8/60 = 251/60 - So, 81/20 + 4/30 = 251/60
In mixed form: 411/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/20+8/30 81/40+4/30 81/20+4/60 81/20+12/30 81/60+4/30 81/20+4/90 81/20+20/30 81/20+28/30