Add 32/20 and 18/42
1st number: 1 12/20, 2nd number: 18/42
32/20 + 18/42 is 71/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 42 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
32/20 = 32 × 21/20 × 21 = 672/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
18/42 = 18 × 10/42 × 10 = 180/420 - Add the two like fractions:
672/420 + 180/420 = 672 + 180/420 = 852/420 - 852/420 simplified gives 71/35
- So, 32/20 + 18/42 = 71/35
In mixed form: 21/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 64/20+18/42 32/20+36/42 32/40+18/42 32/20+18/84 96/20+18/42 32/20+54/42 32/60+18/42 32/20+90/42