Add 72/30 and 8/18
1st number: 2 12/30, 2nd number: 8/18
72/30 + 8/18 is 128/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
72/30 = 72 × 3/30 × 3 = 216/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
8/18 = 8 × 5/18 × 5 = 40/90 - Add the two like fractions:
216/90 + 40/90 = 216 + 40/90 = 256/90 - 256/90 simplified gives 128/45
- So, 72/30 + 8/18 = 128/45
In mixed form: 238/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/30+16/18 72/60+8/18 72/30+8/36 72/30+24/18 72/90+8/18 72/30+8/54 72/30+40/18 72/30+8/90 72/30+56/18