Add 60/40 and 90/42
1st number: 1 20/40, 2nd number: 2 6/42
60/40 + 90/42 is 51/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 42 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
60/40 = 60 × 21/40 × 21 = 1260/840 - Likewise, for the 2nd fraction, since 42 × 20 = 840,
90/42 = 90 × 20/42 × 20 = 1800/840 - Add the two like fractions:
1260/840 + 1800/840 = 1260 + 1800/840 = 3060/840 - 3060/840 simplified gives 51/14
- So, 60/40 + 90/42 = 51/14
In mixed form: 39/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/80+90/42 60/40+90/84