Alright, lets get started.
Jessica can swim a lap in [tex]29\frac{2}{5}[/tex] seconds
Converting it into decimals, [tex]29+\frac{2}{5}[/tex]
Means [tex]29+0.4 = 29.4[/tex] seconds
Means Jessica can swim a lap in 29.4 seconds
Marta can swim a lap in 28.7 seconds.
So, Martha is faster than Jessica by [tex]29.4-28.7=0.7[/tex] seconds
It means Marta is 0.7 seconds faster than Jessica. : Answer
Hope it will help :)
