Add 3/42 and 25/40
3/42 + 25/40 is 39/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 42 × 20 = 840,
3/42 = 3 × 20/42 × 20 = 60/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
25/40 = 25 × 21/40 × 21 = 525/840 - Add the two like fractions:
60/840 + 525/840 = 60 + 525/840 = 585/840 - 585/840 simplified gives 39/56
- So, 3/42 + 25/40 = 39/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/42+25/40 3/42+50/40 3/84+25/40 3/42+25/80 9/42+25/40 3/42+75/40 15/42+25/40 21/42+25/40