Add 30/72 and 12/40
30/72 + 12/40 is 43/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
30/72 = 30 × 5/72 × 5 = 150/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
12/40 = 12 × 9/40 × 9 = 108/360 - Add the two like fractions:
150/360 + 108/360 = 150 + 108/360 = 258/360 - 258/360 simplified gives 43/60
- So, 30/72 + 12/40 = 43/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/72+12/40 30/72+24/40 30/72+12/80 90/72+12/40 30/72+36/40 30/72+60/40 30/72+84/40