Add 45/12 and 40/25
1st number: 3 9/12, 2nd number: 1 15/25
45/12 + 40/25 is 107/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 25 is 300
Next, find the equivalent fraction of both fractional numbers with denominator 300 - For the 1st fraction, since 12 × 25 = 300,
45/12 = 45 × 25/12 × 25 = 1125/300 - Likewise, for the 2nd fraction, since 25 × 12 = 300,
40/25 = 40 × 12/25 × 12 = 480/300 - Add the two like fractions:
1125/300 + 480/300 = 1125 + 480/300 = 1605/300 - 1605/300 simplified gives 107/20
- So, 45/12 + 40/25 = 107/20
In mixed form: 57/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+40/25 45/12+80/25 45/24+40/25 45/12+40/50 45/36+40/25 45/12+40/75 45/60+40/25 45/84+40/25