Add 70/90 and 1/72
70/90 + 1/72 is 19/24.
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,
70/90 = 70 × 4/90 × 4 = 280/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
1/72 = 1 × 5/72 × 5 = 5/360 - Add the two like fractions:
280/360 + 5/360 = 280 + 5/360 = 285/360 - 285/360 simplified gives 19/24
- So, 70/90 + 1/72 = 19/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/90+2/72 70/90+3/72 70/90+5/72 70/90+7/72