Add 42/40 and 21/48
1st number: 1 2/40, 2nd number: 21/48
42/40 + 21/48 is 119/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 48 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 40 × 6 = 240,
42/40 = 42 × 6/40 × 6 = 252/240 - Likewise, for the 2nd fraction, since 48 × 5 = 240,
21/48 = 21 × 5/48 × 5 = 105/240 - Add the two like fractions:
252/240 + 105/240 = 252 + 105/240 = 357/240 - 357/240 simplified gives 119/80
- So, 42/40 + 21/48 = 119/80
In mixed form: 139/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/40+21/48 42/40+42/48 42/80+21/48 42/40+21/96 42/40+63/48