Add 25/40 and 12/42
25/40 + 12/42 is 51/56.
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,
25/40 = 25 × 21/40 × 21 = 525/840 - Likewise, for the 2nd fraction, since 42 × 20 = 840,
12/42 = 12 × 20/42 × 20 = 240/840 - Add the two like fractions:
525/840 + 240/840 = 525 + 240/840 = 765/840 - 765/840 simplified gives 51/56
- So, 25/40 + 12/42 = 51/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/40+12/42 25/40+24/42 25/80+12/42 25/40+12/84 75/40+12/42 25/40+36/42 25/40+60/42 25/40+84/42