Add 12/90 and 70/72
12/90 + 70/72 is 199/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
12/90 = 12 × 4/90 × 4 = 48/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
70/72 = 70 × 5/72 × 5 = 350/360 - Add the two like fractions:
48/360 + 350/360 = 48 + 350/360 = 398/360 - 398/360 simplified gives 199/180
- So, 12/90 + 70/72 = 199/180
In mixed form: 119/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/90+70/72 36/90+70/72 60/90+70/72 84/90+70/72