Add 90/72 and 70/4
1st number: 1 18/72, 2nd number: 17 2/4
90/72 + 70/4 is 75/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 4 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
90/72 = 90 × 1/72 × 1 = 90/72 - Likewise, for the 2nd fraction, since 4 × 18 = 72,
70/4 = 70 × 18/4 × 18 = 1260/72 - Add the two like fractions:
90/72 + 1260/72 = 90 + 1260/72 = 1350/72 - 1350/72 simplified gives 75/4
- So, 90/72 + 70/4 = 75/4
In mixed form: 183/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/72+70/8 90/72+70/12 90/72+70/20 90/72+70/28