60% of 20 =
                   ( 12 )

80% of 30 =
                   (       )

90% of 90 =
                   (       )

30% of 70 =
                   (       )

80% of 70 =
                   (       )

90% of 70 =
                   (       )

10% of 20 =
                   (       )

60% of 30 =
                   (       )

10% of 80 =
                   (       )

          +[         ]

8% of 20 =
                   ( 1.6 )

40% of 8 =
                   (       )

20% of 8 =
                   (       )

80% of 1 =
                   (       )

20% of 8 =
                   (       )

80% of 1 =
                   (       )

5% of 20 =
                   (       )

1% of 30 =
                   (       )

70% of 4 =
                   (       )

          +[         ]

9% of 9 =
                   ( 0.81 )

2% of 6 =
                   (       )

8% of 8 =
                   (       )

4% of 4 =
                   (       )

8% of 8 =
                   (       )

9% of 6 =
                   (       )

6% of 1 =
                   (       )

4% of 1 =
                   (       )

6% of 7 =
                   (       )

          +[         ]

       ++[[            ]]