Add 5/72 and 70/90
5/72 + 70/90 is 61/72.
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,
5/72 = 5 × 5/72 × 5 = 25/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
70/90 = 70 × 4/90 × 4 = 280/360 - Add the two like fractions:
25/360 + 280/360 = 25 + 280/360 = 305/360 - 305/360 simplified gives 61/72
- So, 5/72 + 70/90 = 61/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/72+70/90 15/72+70/90 25/72+70/90 35/72+70/90