Add 72/30 and 90/72
1st number: 2 12/30, 2nd number: 1 18/72
72/30 + 90/72 is 73/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 30 × 12 = 360,
72/30 = 72 × 12/30 × 12 = 864/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
90/72 = 90 × 5/72 × 5 = 450/360 - Add the two like fractions:
864/360 + 450/360 = 864 + 450/360 = 1314/360 - 1314/360 simplified gives 73/20
- So, 72/30 + 90/72 = 73/20
In mixed form: 313/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/60+90/72 72/90+90/72