Find the ratio of the following:

(a) 81 to 108

(b) 98 to 63

(c) 33 km to 121 km

(d) 30 minutes to 45 minutes.

(a) We have to find the ratio of 81 to 108

 ^=  =

(b) We have to find the ratio of 98 to 63

^{=  =}

(c) We have to find the ratio of  33 km to 121 km

^{=  =}

(d) We have to find the ratio of 30 minutes to 45 minutes.

^{=  =}