Grades 7-8 Video Solutions 2026-2026_7-8

Video Transcription

Video Summary

shown in the first diagram. He ate 40% of the first block, 40% of the second block, and 20% of the third block. What percentage of the total amount of cheese did Mirko eat? Let's count up how much cheese is in each of the blocks. The first block has 1 block of cheese, the second one is 8, and the third one is 27. This means that in total, there are 1 plus 8 plus 27 equals 36 cubes of cheese. Now remember that 40% means 0.4, and 20% means 0.2. This means that the total amount of cheese eaten of the first block is 0.4 times 1 equals 0.4 cubes. In the second one, it's 0.4 times 8 equals 3.2 cubes. In the third one, it's 0.2 times 27 equals 5.4 cubes. Adding those up, 0.4 plus 3.2 plus 5.4 equals 9. So the amount eaten is 9 over 36 cubes, or 1 in 4 cubes. That equals 25%. So the answer is E, 25%.

Keywords

cheese

percentage

fractions

cubes

math problem