10% of 40 =
                   ( 4 )

80% of 80 =
                   (       )

90% of 40 =
                   (       )

40% of 90 =
                   (       )

80% of 20 =
                   (       )

90% of 90 =
                   (       )

10% of 50 =
                   (       )

50% of 90 =
                   (       )

10% of 30 =
                   (       )

          +[         ]

80% of 6 =
                   ( 4.8 )

4% of 30 =
                   (       )

2% of 10 =
                   (       )

80% of 4 =
                   (       )

1% of 30 =
                   (       )

80% of 5 =
                   (       )

50% of 6 =
                   (       )

1% of 70 =
                   (       )

70% of 9 =
                   (       )

          +[         ]

9% of 4 =
                   ( 0.36 )

2% of 8 =
                   (       )

8% of 3 =
                   (       )

5% of 6 =
                   (       )

7% of 3 =
                   (       )

1% of 8 =
                   (       )

6% of 4 =
                   (       )

4% of 6 =
                   (       )

6% of 4 =
                   (       )

          +[         ]

       ++[[            ]]