60% of 90 =
                   ( 54 )

30% of 80 =
                   (       )

10% of 30 =
                   (       )

80% of 90 =
                   (       )

20% of 50 =
                   (       )

30% of 40 =
                   (       )

40% of 80 =
                   (       )

60% of 20 =
                   (       )

30% of 80 =
                   (       )

          +[         ]

90% of 6 =
                   ( 5.4 )

80% of 3 =
                   (       )

30% of 2 =
                   (       )

30% of 6 =
                   (       )

30% of 9 =
                   (       )

90% of 7 =
                   (       )

80% of 8 =
                   (       )

4% of 90 =
                   (       )

70% of 3 =
                   (       )

          +[         ]

1% of 2 =
                   ( 0.02 )

7% of 6 =
                   (       )

8% of 6 =
                   (       )

9% of 5 =
                   (       )

3% of 3 =
                   (       )

4% of 1 =
                   (       )

1% of 5 =
                   (       )

7% of 9 =
                   (       )

9% of 6 =
                   (       )

          +[         ]

       ++[[            ]]