`d,(8^30+2.8^31+3.8^32)/(3.4^45+4^46+5.4^47)`

`=((2^3)^30+2.(2^3)^31+3.(2^3)^32)/(3.(2^2)^45+(2^2)^46+5.(2^2)^47)`

`=(2^90+2.2^93+3.2^96)/(3.2^90+2^92+5.2^94)`

`=(2^90.(1+2.2^3+3.2^6))/(2^90.(3+2^2+5.2^4))`

`=(1+2.2^3+3.2^6)/(3+2^2+5.2^4)`

`=(1+2.8+3.64)/(3+4+5.16)`

`=(1+16+192)/(3+4+80)`

`=209/87`