Answers

Add 24/84 and 21/60

24/84 + 21/60 is 89/140.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 60 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 84 × 5 = 420,
   24/84 = 24 × 5/84 × 5 = 120/420
3. Likewise, for the 2nd fraction, since 60 × 7 = 420,
   21/60 = 21 × 7/60 × 7 = 147/420
4. Add the two like fractions:
   120/420 + 147/420 = 120 + 147/420 = 267/420
5. 267/420 simplified gives 89/140
6. So, 24/84 + 21/60 = 89/140

MathStep (Works offline)

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

Related: ⁴⁸/₈₄+²¹/₆₀ ²⁴/₈₄+⁴²/₆₀ ⁷²/₈₄+²¹/₆₀ ²⁴/₈₄+⁶³/₆₀

Add Fractions Calculator