Add 12/40 and 36/90
12/40 + 36/90 is 7/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
12/40 = 12 × 9/40 × 9 = 108/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
36/90 = 36 × 4/90 × 4 = 144/360 - Add the two like fractions:
108/360 + 144/360 = 108 + 144/360 = 252/360 - 252/360 simplified gives 7/10
- So, 12/40 + 36/90 = 7/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/40+36/90 12/40+72/90 12/80+36/90 36/40+36/90 60/40+36/90 84/40+36/90