20% of 60 =
                   ( 12 )

90% of 20 =
                   (       )

10% of 60 =
                   (       )

50% of 20 =
                   (       )

10% of 40 =
                   (       )

20% of 20 =
                   (       )

30% of 70 =
                   (       )

60% of 40 =
                   (       )

20% of 60 =
                   (       )

          +[         ]

9% of 90 =
                   ( 8.1 )

40% of 7 =
                   (       )

30% of 5 =
                   (       )

90% of 7 =
                   (       )

20% of 7 =
                   (       )

90% of 8 =
                   (       )

60% of 1 =
                   (       )

20% of 1 =
                   (       )

8% of 20 =
                   (       )

          +[         ]

1% of 7 =
                   ( 0.07 )

4% of 1 =
                   (       )

1% of 6 =
                   (       )

6% of 8 =
                   (       )

8% of 7 =
                   (       )

2% of 2 =
                   (       )

8% of 6 =
                   (       )

4% of 1 =
                   (       )

7% of 6 =
                   (       )

          +[         ]

       ++[[            ]]