Answer:
1
Step-by-step explanation:
M<1 = M<3
these 2 angles are equal for parallel lines
6x=120
X=120/6=20
Similar shapes are just shapes that have the same proportions and relative size. For example, a square that's 4 x 4 and a square that's 2 x 2. Although one's smaller, they are both the similar shapes.

so 4/5 of A is really 80% of A then.
since a whole A is 100% of A, 100% - 80% = 20%, A is being reduced by 20%, namely 1/5.