Hey there!
First, let’s divide 1 hour (60 minutes) by 6 (so we can see how much each 1/6 is worth in minutes)
60 ÷ 6 = 10
So, each 1/6 = 10 minutes
Nina practiced for 10 minutes & Santiago practiced for 40 minutes.
Therefore, Santiago practiced for 30 minutes longer (or 3/6) than Nina
Hope this helps you!
God bless ❤️
xXxGolferGirlxXx