40% of 40 =
                   ( 16 )

20% of 80 =
                   (       )

30% of 30 =
                   (       )

80% of 80 =
                   (       )

30% of 30 =
                   (       )

40% of 90 =
                   (       )

50% of 50 =
                   (       )

90% of 10 =
                   (       )

40% of 30 =
                   (       )

          +[         ]

30% of 6 =
                   ( 1.8 )

7% of 30 =
                   (       )

60% of 2 =
                   (       )

2% of 50 =
                   (       )

5% of 30 =
                   (       )

3% of 60 =
                   (       )

8% of 60 =
                   (       )

40% of 8 =
                   (       )

1% of 10 =
                   (       )

          +[         ]

30% of 3 =
                   ( 0.9 )

5% of 20 =
                   (       )

2% of 60 =
                   (       )

7% of 40 =
                   (       )

4% of 80 =
                   (       )

2% of 50 =
                   (       )

9% of 10 =
                   (       )

70% of 9 =
                   (       )

8% of 50 =
                   (       )

          +[         ]

       ++[[            ]]