10% of 90 =
                   ( 9 )

80% of 40 =
                   (       )

90% of 80 =
                   (       )

90% of 40 =
                   (       )

40% of 70 =
                   (       )

50% of 50 =
                   (       )

20% of 90 =
                   (       )

10% of 50 =
                   (       )

10% of 80 =
                   (       )

          +[         ]

4% of 20 =
                   ( 0.8 )

40% of 8 =
                   (       )

2% of 70 =
                   (       )

40% of 9 =
                   (       )

6% of 80 =
                   (       )

80% of 1 =
                   (       )

1% of 20 =
                   (       )

50% of 3 =
                   (       )

70% of 5 =
                   (       )

          +[         ]

9% of 9 =
                   ( 0.81 )

3% of 4 =
                   (       )

4% of 8 =
                   (       )

5% of 2 =
                   (       )

3% of 8 =
                   (       )

6% of 3 =
                   (       )

2% of 8 =
                   (       )

4% of 2 =
                   (       )

6% of 9 =
                   (       )

          +[         ]

       ++[[            ]]