Add 40/80 and 90/12
1st number: 40/80, 2nd number: 7 6/12
40/80 + 90/12 is 8/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 12 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 80 × 3 = 240,
40/80 = 40 × 3/80 × 3 = 120/240 - Likewise, for the 2nd fraction, since 12 × 20 = 240,
90/12 = 90 × 20/12 × 20 = 1800/240 - Add the two like fractions:
120/240 + 1800/240 = 120 + 1800/240 = 1920/240 - 1920/240 simplified gives 8/1
- So, 40/80 + 90/12 = 8/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/80+90/24 40/80+90/36 40/80+90/60 40/80+90/84