The number of yellow flowers Mary picked is 9 .
Mary picked 15 flowers from her garden. Three out of the five flowers are yellow. In order to determine the total number of yellow flowers she picked, the relationship between 5 and 15 have to determined. 15 is a multiple of 5. 5 multiplied by 3 is equivalent by 15.
If there are 3 yellow flowers in 5 flowers, in order to determine the total number of yellow flowers that Mary picked, 3 would be multiplied with 3. Number of yellow flowers Mary picked = 3 x 3 = 9 flowers.
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