Add 15/20 and 45/72
15/20 + 45/72 is 11/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 20 × 18 = 360,
15/20 = 15 × 18/20 × 18 = 270/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
45/72 = 45 × 5/72 × 5 = 225/360 - Add the two like fractions:
270/360 + 225/360 = 270 + 225/360 = 495/360 - 495/360 simplified gives 11/8
- So, 15/20 + 45/72 = 11/8
In mixed form: 13/8
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