90% of 10 =
                   ( 9 )

70% of 60 =
                   (       )

60% of 40 =
                   (       )

50% of 10 =
                   (       )

10% of 30 =
                   (       )

20% of 10 =
                   (       )

70% of 50 =
                   (       )

70% of 20 =
                   (       )

70% of 40 =
                   (       )

          +[         ]

5% of 80 =
                   ( 4 )

10% of 4 =
                   (       )

80% of 3 =
                   (       )

50% of 6 =
                   (       )

70% of 4 =
                   (       )

50% of 7 =
                   (       )

60% of 7 =
                   (       )

60% of 9 =
                   (       )

40% of 2 =
                   (       )

          +[         ]

1% of 4 =
                   ( 0.04 )

9% of 9 =
                   (       )

9% of 5 =
                   (       )

7% of 7 =
                   (       )

9% of 5 =
                   (       )

2% of 9 =
                   (       )

3% of 5 =
                   (       )

5% of 7 =
                   (       )

7% of 5 =
                   (       )

          +[         ]

       ++[[            ]]