mohon bantuannya lagi ya

7. 2 1/5 : 1/5 * 12%
    11/15 * 5/1 *3/25
    =165/375
8. 1 1/9 * 9% : 9/20
      10/9 *9/100:9/20
       1/10 * 20/9
      =2/9

semoga membantu :v