Answers

Add 21/75 and 84/72

1^st number: 21/75, 2^nd number: 1 12/72

21/75 + 84/72 is 217/150.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 75 and 72 is 1800
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1800
2. For the 1st fraction, since 75 × 24 = 1800,
   21/75 = 21 × 24/75 × 24 = 504/1800
3. Likewise, for the 2nd fraction, since 72 × 25 = 1800,
   84/72 = 84 × 25/72 × 25 = 2100/1800
4. Add the two like fractions:
   504/1800 + 2100/1800 = 504 + 2100/1800 = 2604/1800
5. 2604/1800 simplified gives 217/150
6. So, 21/75 + 84/72 = 217/150
   In mixed form: 167/150

MathStep (Works offline)

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

Related: ⁴²/₇₅+⁸⁴/₇₂ ⁶³/₇₅+⁸⁴/₇₂

Add Fractions Calculator