Danika and karen bought a pizza that was cut into 8 slices. if danika ate 3/4 of the pizza, how many slices were left for karen?

Since 4/4 is 8, to solve for 1/4, you have to divide 8 by 4, which is 2. 1/4 = 2, so 2/4 = 4, and 3/4 = 6. Danika ate 6 slices of pizza because she ate 3/4 of the pizza. Since there is only 1/4 left, Karen only has 2 slices of pizza left. Another way you could do it is you could subtract 6 from 8 to get the remaining amount, and you would still get 2 slices left for Karen.

The percent increase is 25%