In the 100 meter race, Xiao Dong took 18 seconds and Xiao Ming one fourth of a minute. Who can run fast?

In the 100 meter race, Xiao Dong took 18 seconds and Xiao Ming one fourth of a minute. Who can run fast?

Xiaoming took 60 seconds * 1 / 4 = 15 seconds
Xiao Ming, hurry up