Answers

Add 42/84 and 3/70

42/84 + 3/70 is 19/35.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 70 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 84 × 5 = 420,
   42/84 = 42 × 5/84 × 5 = 210/420
3. Likewise, for the 2nd fraction, since 70 × 6 = 420,
   3/70 = 3 × 6/70 × 6 = 18/420
4. Add the two like fractions:
   210/420 + 18/420 = 210 + 18/420 = 228/420
5. 228/420 simplified gives 19/35
6. So, 42/84 + 3/70 = 19/35

MathStep (Works offline)

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

Related: ⁴²/₈₄+⁶/₇₀ ⁴²/₈₄+⁹/₇₀ ⁴²/₈₄+¹⁵/₇₀ ⁴²/₈₄+²¹/₇₀

Add Fractions Calculator