Answers

Add 7/80 and 63/84

7/80 + 63/84 is 67/80.

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,
   7/80 = 7 × 21/80 × 21 = 147/1680
3. Likewise, for the 2nd fraction, since 84 × 20 = 1680,
   63/84 = 63 × 20/84 × 20 = 1260/1680
4. Add the two like fractions:
   147/1680 + 1260/1680 = 147 + 1260/1680 = 1407/1680
5. 1407/1680 simplified gives 67/80
6. So, 7/80 + 63/84 = 67/80

MathStep (Works offline)

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

Related: ¹⁴/₈₀+⁶³/₈₄ ²¹/₈₀+⁶³/₈₄ ³⁵/₈₀+⁶³/₈₄ ⁴⁹/₈₀+⁶³/₈₄

Add Fractions Calculator