kak tolong dijawab dengan benar yaa

4a/15 = 2/35
35 × 4a = 15 × 2
140a = 30
a = 30/140
a = 3/14

7a
= 7 × 3/14
= 21/14
= 3/2
= 1½

Jawaban : C. 3/2

Maaf Kalau Salah