Add 42/30 and 20/8
1st number: 1 12/30, 2nd number: 2 4/8
42/30 + 20/8 is 39/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 8 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
42/30 = 42 × 4/30 × 4 = 168/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
20/8 = 20 × 15/8 × 15 = 300/120 - Add the two like fractions:
168/120 + 300/120 = 168 + 300/120 = 468/120 - 468/120 simplified gives 39/10
- So, 42/30 + 20/8 = 39/10
In mixed form: 39/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/30+20/8 42/30+40/8 42/60+20/8 42/30+20/16 42/30+60/8 42/90+20/8 42/30+20/24 42/30+20/40 42/30+20/56