Add 4/80 and 72/18
1st number: 4/80, 2nd number: 4 0/18
4/80 + 72/18 is 81/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 18 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
4/80 = 4 × 9/80 × 9 = 36/720 - Likewise, for the 2nd fraction, since 18 × 40 = 720,
72/18 = 72 × 40/18 × 40 = 2880/720 - Add the two like fractions:
36/720 + 2880/720 = 36 + 2880/720 = 2916/720 - 2916/720 simplified gives 81/20
- So, 4/80 + 72/18 = 81/20
In mixed form: 41/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/80+72/18 4/80+72/36 12/80+72/18 4/80+72/54 20/80+72/18 4/80+72/90 28/80+72/18