90% of 80 =
                   ( 72 )

20% of 30 =
                   (       )

30% of 70 =
                   (       )

30% of 30 =
                   (       )

70% of 60 =
                   (       )

30% of 40 =
                   (       )

50% of 80 =
                   (       )

90% of 50 =
                   (       )

80% of 70 =
                   (       )

          +[         ]

20% of 2 =
                   ( 0.4 )

3% of 70 =
                   (       )

10% of 6 =
                   (       )

2% of 80 =
                   (       )

9% of 70 =
                   (       )

70% of 9 =
                   (       )

4% of 10 =
                   (       )

40% of 2 =
                   (       )

6% of 40 =
                   (       )

          +[         ]

80% of 7 =
                   ( 5.6 )

5% of 60 =
                   (       )

10% of 1 =
                   (       )

30% of 7 =
                   (       )

9% of 20 =
                   (       )

2% of 90 =
                   (       )

80% of 6 =
                   (       )

2% of 40 =
                   (       )

4% of 80 =
                   (       )

          +[         ]

       ++[[            ]]