Add 90/30 and 90/72
1st number: 3 0/30, 2nd number: 1 18/72
90/30 + 90/72 is 17/4.
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,
90/30 = 90 × 12/30 × 12 = 1080/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
90/72 = 90 × 5/72 × 5 = 450/360 - Add the two like fractions:
1080/360 + 450/360 = 1080 + 450/360 = 1530/360 - 1530/360 simplified gives 17/4
- So, 90/30 + 90/72 = 17/4
In mixed form: 41/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/60+90/72