The answer is B hopefully this helped
Keeping in mind that 16 = 2*2*2*2, thus 16 = 2⁴
X=2
-- ---
5 3
Cross multiply:
3x=10
x=10/3
2=5
-- ---
3 y
2y=15
y=15/2
10/3=15/2 :)
They didn’t use a ruler I think they made their own materials from what they had. Also thank you.