Add 90/72 and 12/30
1st number: 1 18/72, 2nd number: 12/30
90/72 + 12/30 is 33/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 30 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
90/72 = 90 × 5/72 × 5 = 450/360 - Likewise, for the 2nd fraction, since 30 × 12 = 360,
12/30 = 12 × 12/30 × 12 = 144/360 - Add the two like fractions:
450/360 + 144/360 = 450 + 144/360 = 594/360 - 594/360 simplified gives 33/20
- So, 90/72 + 12/30 = 33/20
In mixed form: 113/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/72+24/30 90/72+12/60 90/72+36/30 90/72+12/90 90/72+60/30 90/72+84/30