I don't speak Spanish but I think that this is what you meant:
80 * 2/5 = 32
so 2/5 of 80 % is 32 % (80/5 * 2)
Greeting to you! My name is Cecille and I’m here to answer that question
For more explanation, please see the attachment

25/3 pages of a book in 10 minutes
Multiply both numbers by the reciprocal of 10, which is 1/10


So, Charlotte reads
5/6 pages of a book in 1 minute.
15x4y2 letter B is your answer
30 because the angles of the triangle should be 180. Since we know one is 90 the other is 60 so 180-(90+60)=30