Luke had some cherry wafers and chocolate chip wafers. ⁵₆ of the number of cherry wafers was equal to ¹₅ of the number of chocolate chip wafers. After Luke made -11 more cherry wafers, the number of cherry wafers was ¹₅ of the number of chocolate chip wafers. How many wafers did he have altogether in the end?
Make the numerators the same. LCM of 5 and 1 is 5.

56 of cherry wafers = 1x55x5 of chocolate chip wafers

⁵₆ of cherry wafers = ⁵₂₅ of chocolate chip wafers

	Cherry wafers	Chocolate chip wafers	Total
Before	6 u	25 u
Change	+ -11
After	1x5 = 5 u	5x5 = 25 u	30 u

The number of chocolate chip wafers remains unchanged.  Make the number of chocolate chip wafers the same.  LCM of 5 and 25 is 25.

Number of more cherry wafers made
= 5 u - 6 u
= -1 u

-1 u = -11

1 u = -11 ÷ -1 = 11

Number of wafers that Luke had in the end
= 5 u + 25 u
= 30 u
= 30 x 11
= 330

Answer(s): 330