Answer:
12.79%
Step-by-step explanation:
Let :
Great grand mother = 86 years
Jenny = 11 years
Let the percentage = x
x % of great grandmother's age = Jenny's age
x% * 86 = 11
x/ 100 * 86 = 11
86x / 100 = 11
86x = 100 * 11
86x = 1100
x = 1100/86
x = 12.79
x = 12.79%
They are 90* because perpendicular sides form a right angle hope this helped have a great day!!!
Answer: 21
Step-by-step explanation:4/4=1 5x4=20 20+1 = 21
