Long Divison and the rule of 78

[Menomena]

Homework Statement

u = f k(k + 1)/ n(n +1) f= 700, k =4, n=36

Homework Equations

u = 700 x 4(4 + 1)/36(36 + 1)

The Attempt at a Solution

700 x 20/1332 ≈ 10.51 I can't figure out how 20/1332 = 0.015015015, every time I divide it I get 0.0666, I literally have no clue how that is the answer. I feel so dumb.

 

[Mark44]

Homework Statement

u = f k(k + 1)/ n(n +1) f= 700, k =4, n=36

Homework Equations

u = 700 x 4(4 + 1)/36(36 + 1)

The Attempt at a Solution

700 x 20/1332 ≈ 10.51 I can't figure out how 20/1332 = 0.015015015, every time I divide it I get 0.0666, I literally have no clue how that is the answer. I feel so dumb.

What does this have to do with long division or the rule of 78?

Are you actually doing long division?

What is so difficult about calculating 20/1332? It looks to me like you might be dividing 1332 by 20 (and getting the decimal places wrong) rather than dividing 20 by 1332.