Add 42/60 and 18/80
42/60 + 18/80 is 37/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 60 × 4 = 240,
42/60 = 42 × 4/60 × 4 = 168/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
18/80 = 18 × 3/80 × 3 = 54/240 - Add the two like fractions:
168/240 + 54/240 = 168 + 54/240 = 222/240 - 222/240 simplified gives 37/40
- So, 42/60 + 18/80 = 37/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/60+18/80 42/60+36/80 42/60+54/80 42/60+90/80