Add 42/30 and 8/18
1st number: 1 12/30, 2nd number: 8/18
42/30 + 8/18 is 83/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
42/30 = 42 × 3/30 × 3 = 126/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
8/18 = 8 × 5/18 × 5 = 40/90 - Add the two like fractions:
126/90 + 40/90 = 126 + 40/90 = 166/90 - 166/90 simplified gives 83/45
- So, 42/30 + 8/18 = 83/45
In mixed form: 138/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/30+8/18 42/30+16/18 42/60+8/18 42/30+8/36 42/30+24/18 42/90+8/18 42/30+8/54 42/30+40/18 42/30+8/90 42/30+56/18