Answers

Add 70/45 and 90/72

1^st number: 1 25/45, 2^nd number: 1 18/72

70/45 + 90/72 is 101/36.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 72 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 45 × 8 = 360,
   70/45 = 70 × 8/45 × 8 = 560/360
3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
   90/72 = 90 × 5/72 × 5 = 450/360
4. Add the two like fractions:
   560/360 + 450/360 = 560 + 450/360 = 1010/360
5. 1010/360 simplified gives 101/36
6. So, 70/45 + 90/72 = 101/36
   In mixed form: 229/36

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related: ⁷⁰/₉₀+⁹⁰/₇₂

Add Fractions Calculator