90% of 60 =
                   ( 54 )

20% of 70 =
                   (       )

80% of 60 =
                   (       )

80% of 70 =
                   (       )

30% of 10 =
                   (       )

80% of 20 =
                   (       )

90% of 70 =
                   (       )

90% of 80 =
                   (       )

40% of 20 =
                   (       )

          +[         ]

70% of 9 =
                   ( 6.3 )

7% of 20 =
                   (       )

10% of 4 =
                   (       )

70% of 7 =
                   (       )

50% of 1 =
                   (       )

70% of 7 =
                   (       )

9% of 40 =
                   (       )

4% of 60 =
                   (       )

60% of 3 =
                   (       )

          +[         ]

80% of 6 =
                   ( 4.8 )

50% of 9 =
                   (       )

20% of 4 =
                   (       )

30% of 6 =
                   (       )

9% of 10 =
                   (       )

70% of 7 =
                   (       )

90% of 9 =
                   (       )

7% of 70 =
                   (       )

9% of 20 =
                   (       )

          +[         ]

       ++[[            ]]