Add 42/84 and 60/40
1st number: 42/84, 2nd number: 1 20/40
42/84 + 60/40 is 2/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 84 × 10 = 840,
42/84 = 42 × 10/84 × 10 = 420/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
60/40 = 60 × 21/40 × 21 = 1260/840 - Add the two like fractions:
420/840 + 1260/840 = 420 + 1260/840 = 1680/840 - 1680/840 simplified gives 2/1
- So, 42/84 + 60/40 = 2/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/84+60/80