Calculate 5/8 of 40.

Calculate 5/8 of 40.

• A. 25
• B. 20
• C. 40
• D. 30

Answer: (A)

Finding a fraction of a number means multiplying the number by that fraction. So five-eighths of forty is (5/8) × 40. You can divide 40 by 8 to get 5, then multiply by 5 to get 25. Or multiply 40 by 5 to get 200, then divide by 8 to get 25. Since 5/8 is 0.625, 40 × 0.625 = 25. For a quick sense check, half of forty is twenty and three quarters of forty is thirty, so five-eighths sits between them, which matches 25. The result is 25.

Finding a fraction of a number means multiplying the number by that fraction. So five-eighths of forty is (5/8) × 40. You can divide 40 by 8 to get 5, then multiply by 5 to get 25. Or multiply 40 by 5 to get 200, then divide by 8 to get 25. Since 5/8 is 0.625, 40 × 0.625 = 25. For a quick sense check, half of forty is twenty and three quarters of forty is thirty, so five-eighths sits between them, which matches 25. The result is 25.