Answers

Add 42/60 and 42/80

42/60 + 42/80 is 49/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 60 and 80 is 240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 240
2. For the 1st fraction, since 60 × 4 = 240,
   42/60 = 42 × 4/60 × 4 = 168/240
3. Likewise, for the 2nd fraction, since 80 × 3 = 240,
   42/80 = 42 × 3/80 × 3 = 126/240
4. Add the two like fractions:
   168/240 + 126/240 = 168 + 126/240 = 294/240
5. 294/240 simplified gives 49/40
6. So, 42/60 + 42/80 = 49/40
   In mixed form: 19/40

MathStep (Works offline)

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

Related: ⁸⁴/₆₀+⁴²/₈₀ ⁴²/₆₀+⁸⁴/₈₀

Add Fractions Calculator