Add 45/20 and 25/40
1st number: 2 5/20, 2nd number: 25/40
45/20 + 25/40 is 23/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
45/20 = 45 × 2/20 × 2 = 90/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
25/40 = 25 × 1/40 × 1 = 25/40 - Add the two like fractions:
90/40 + 25/40 = 90 + 25/40 = 115/40 - 115/40 simplified gives 23/8
- So, 45/20 + 25/40 = 23/8
In mixed form: 27/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20+25/40 45/20+50/40 45/40+25/40 45/20+25/80 45/20+75/40 45/60+25/40