Add 45/72 and 49/90
45/72 + 49/90 is 421/360.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
45/72 = 45 × 5/72 × 5 = 225/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
49/90 = 49 × 4/90 × 4 = 196/360 - Add the two like fractions:
225/360 + 196/360 = 225 + 196/360 = 421/360 - So, 45/72 + 49/90 = 421/360
In mixed form: 161/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/72+49/90 45/72+98/90