Answers

Add 21/80 and 25/84

21/80 + 25/84 is 941/1680.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 84 is 1680
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1680
2. For the 1st fraction, since 80 × 21 = 1680,
   21/80 = 21 × 21/80 × 21 = 441/1680
3. Likewise, for the 2nd fraction, since 84 × 20 = 1680,
   25/84 = 25 × 20/84 × 20 = 500/1680
4. Add the two like fractions:
   441/1680 + 500/1680 = 441 + 500/1680 = 941/1680
5. So, 21/80 + 25/84 = 941/1680

MathStep (Works offline)

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

Related: ⁴²/₈₀+²⁵/₈₄ ²¹/₈₀+⁵⁰/₈₄ ⁶³/₈₀+²⁵/₈₄ ²¹/₈₀+⁷⁵/₈₄

Add Fractions Calculator