Add 42/40 and 18/30
1st number: 1 2/40, 2nd number: 18/30
42/40 + 18/30 is 33/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 30 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
42/40 = 42 × 3/40 × 3 = 126/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
18/30 = 18 × 4/30 × 4 = 72/120 - Add the two like fractions:
126/120 + 72/120 = 126 + 72/120 = 198/120 - 198/120 simplified gives 33/20
- So, 42/40 + 18/30 = 33/20
In mixed form: 113/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/40+18/30 42/40+36/30 42/80+18/30 42/40+18/60 42/40+54/30 42/40+18/90 42/40+90/30