90% of 80 =
                   ( 72 )

30% of 30 =
                   (       )

90% of 60 =
                   (       )

80% of 30 =
                   (       )

30% of 60 =
                   (       )

40% of 40 =
                   (       )

10% of 80 =
                   (       )

90% of 40 =
                   (       )

50% of 70 =
                   (       )

          +[         ]

80% of 1 =
                   ( 0.8 )

8% of 70 =
                   (       )

60% of 5 =
                   (       )

30% of 8 =
                   (       )

60% of 7 =
                   (       )

30% of 9 =
                   (       )

40% of 1 =
                   (       )

50% of 2 =
                   (       )

20% of 3 =
                   (       )

          +[         ]

4% of 7 =
                   ( 0.28 )

7% of 2 =
                   (       )

3% of 7 =
                   (       )

5% of 9 =
                   (       )

7% of 7 =
                   (       )

1% of 2 =
                   (       )

2% of 7 =
                   (       )

8% of 1 =
                   (       )

1% of 8 =
                   (       )

          +[         ]

       ++[[            ]]