Add 63/90 and 18/72
63/90 + 18/72 is 19/20.
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,
63/90 = 63 × 4/90 × 4 = 252/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
18/72 = 18 × 5/72 × 5 = 90/360 - Add the two like fractions:
252/360 + 90/360 = 252 + 90/360 = 342/360 - 342/360 simplified gives 19/20
- So, 63/90 + 18/72 = 19/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/90+36/72 63/90+54/72 63/90+90/72