Answers

Add 42/10 and 42/84

1^st number: 4 2/10, 2^nd number: 42/84

42/10 + 42/84 is 47/10.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 10 and 84 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 10 × 42 = 420,
   42/10 = 42 × 42/10 × 42 = 1764/420
3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
   42/84 = 42 × 5/84 × 5 = 210/420
4. Add the two like fractions:
   1764/420 + 210/420 = 1764 + 210/420 = 1974/420
5. 1974/420 simplified gives 47/10
6. So, 42/10 + 42/84 = 47/10
   In mixed form: 47/10

MathStep (Works offline)

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

Related: ⁸⁴/₁₀+⁴²/₈₄ ⁴²/₂₀+⁴²/₈₄ ⁴²/₃₀+⁴²/₈₄ ⁴²/₅₀+⁴²/₈₄ ⁴²/₇₀+⁴²/₈₄

Add Fractions Calculator