`A = 92 - 1/9 - 2/10 - 3/11 - ............... - 92/100`

`A = 92 - [ (1 - 1/9) + (1 - 8/10) + (1 -8/11) + ................... + ( 1- 8/100)]`

`A = 92 - [92 - 8 ( 1/9 + 1/10 + 1/11 + ................ + 1/100)]`

`A = 8 (1/9 + 1/10 + 1/11 +..................... + 1/100)`

`B = 1/45 + 1/50 + 1/55 + ...................... + 1/500`

`B = 1/5 ( 1/9 + 1/10 + 1/11 + ................ 1/100)`

`A/B = [8 (1/9 + 1/10 + 1/11 +..................... + 1/100)]/[1/5 ( 1/9 + 1/10 + 1/11 + ................ 1/100)]`

`A/B = 8 : 1/5`

`A/B = 8 * 5`

`A/B = 40`