Find the value of ? such that ?% of 400 plus 40% of 160 equals 17% of 400.
Explanation
Let ? be the unknown percentage. Then, (?/100) × 400 + (40/100) × 160 = (17/100) × 400. Simplifying, 4? + 64 = 68, which leads to 4? = 4, so ? = 1.
Let ? be the unknown percentage. Then, (?/100) × 400 + (40/100) × 160 = (17/100) × 400. Simplifying, 4? + 64 = 68, which leads to 4? = 4, so ? = 1.