Add 70/72 and 40/20
1st number: 70/72, 2nd number: 2 0/20
70/72 + 40/20 is 107/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 20 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
70/72 = 70 × 5/72 × 5 = 350/360 - Likewise, for the 2nd fraction, since 20 × 18 = 360,
40/20 = 40 × 18/20 × 18 = 720/360 - Add the two like fractions:
350/360 + 720/360 = 350 + 720/360 = 1070/360 - 1070/360 simplified gives 107/36
- So, 70/72 + 40/20 = 107/36
In mixed form: 235/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/72+80/20 70/72+40/60