Add 15/30 and 63/72
15/30 + 63/72 is 11/8.
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,
15/30 = 15 × 12/30 × 12 = 180/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
63/72 = 63 × 5/72 × 5 = 315/360 - Add the two like fractions:
180/360 + 315/360 = 180 + 315/360 = 495/360 - 495/360 simplified gives 11/8
- So, 15/30 + 63/72 = 11/8
In mixed form: 13/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 15/60+63/72 45/30+63/72 15/90+63/72 75/30+63/72