50% of 40 =
                   ( 20 )

30% of 90 =
                   (       )

40% of 50 =
                   (       )

80% of 90 =
                   (       )

30% of 40 =
                   (       )

40% of 10 =
                   (       )

50% of 50 =
                   (       )

90% of 20 =
                   (       )

50% of 40 =
                   (       )

          +[         ]

30% of 7 =
                   ( 2.1 )

7% of 40 =
                   (       )

60% of 3 =
                   (       )

3% of 50 =
                   (       )

50% of 4 =
                   (       )

30% of 6 =
                   (       )

9% of 70 =
                   (       )

4% of 10 =
                   (       )

2% of 10 =
                   (       )

          +[         ]

4% of 3 =
                   ( 0.12 )

7% of 8 =
                   (       )

3% of 5 =
                   (       )

9% of 7 =
                   (       )

2% of 6 =
                   (       )

5% of 9 =
                   (       )

1% of 6 =
                   (       )

8% of 7 =
                   (       )

9% of 6 =
                   (       )

          +[         ]

       ++[[            ]]