Add 70/72 and 15/20
70/72 + 15/20 is 31/18.
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,
15/20 = 15 × 18/20 × 18 = 270/360 - Add the two like fractions:
350/360 + 270/360 = 350 + 270/360 = 620/360 - 620/360 simplified gives 31/18
- So, 70/72 + 15/20 = 31/18
In mixed form: 113/18
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