let me guess - a PM of heartful apologies for going completely nuts and over board on what was meant to be a positive thread?
Anger management maybe U.S?
wise words...my first win was a nag called Manchester Skytrain 50p at 7/2 on a hot July Goodwood day in 1984. Remember the thrill. As a wee thirteen year old I put the winning towards a new Fred Perry.
but 10/1 and 66/1 doubles up as 660-1, so 450/1 are reduced odds?
On Ladbrokes BHAFC ton win was around 40/1 and Murray scoring first 9/1 so that doubled is 360/1
It's 409/1
I calculate it a different formula to you .
40+1 x 9+1 - 1x1-1 = 409/1
It's simpler to do it when the odds are expressed in decimals ;
41.0 x 10.0 = 410.0
Should read ; 40+1 x 9+1 ÷ 1 x 1 - 1