Add 12/42 and 32/40
12/42 + 32/40 is 38/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 42 × 20 = 840,
12/42 = 12 × 20/42 × 20 = 240/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
32/40 = 32 × 21/40 × 21 = 672/840 - Add the two like fractions:
240/840 + 672/840 = 240 + 672/840 = 912/840 - 912/840 simplified gives 38/35
- So, 12/42 + 32/40 = 38/35
In mixed form: 13/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/42+32/40 12/42+64/40 12/84+32/40 12/42+32/80 36/42+32/40 12/42+96/40 60/42+32/40 84/42+32/40