Add 20/40 and 75/45
1st number: 20/40, 2nd number: 1 30/45
20/40 + 75/45 is 13/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 45 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
20/40 = 20 × 9/40 × 9 = 180/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
75/45 = 75 × 8/45 × 8 = 600/360 - Add the two like fractions:
180/360 + 600/360 = 180 + 600/360 = 780/360 - 780/360 simplified gives 13/6
- So, 20/40 + 75/45 = 13/6
In mixed form: 21/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/80+75/45 20/40+75/90 60/40+75/45