30 POINTS PLEASEEEEE HELPSSS

Answer:
d) 35/100 = 42/x
Step-by-step explanation:
Let x = unknown number
If 42 is 35% of x then:
⇒ 42 = 35% · x
⇒ 42 = 35/100 · x
⇒ 35/100 = 42/x