90% of 40 =
                   ( 36 )

20% of 80 =
                   (       )

80% of 30 =
                   (       )

70% of 80 =
                   (       )

30% of 20 =
                   (       )

40% of 90 =
                   (       )

50% of 50 =
                   (       )

40% of 90 =
                   (       )

40% of 40 =
                   (       )

          +[         ]

70% of 6 =
                   ( 4.2 )

70% of 3 =
                   (       )

1% of 20 =
                   (       )

30% of 4 =
                   (       )

5% of 30 =
                   (       )

70% of 5 =
                   (       )

40% of 6 =
                   (       )

80% of 7 =
                   (       )

10% of 1 =
                   (       )

          +[         ]

8% of 3 =
                   ( 0.24 )

6% of 7 =
                   (       )

2% of 4 =
                   (       )

4% of 6 =
                   (       )

6% of 4 =
                   (       )

9% of 8 =
                   (       )

1% of 4 =
                   (       )

7% of 6 =
                   (       )

9% of 4 =
                   (       )

          +[         ]

       ++[[            ]]