70% of 50 =
                   ( 35 )

50% of 90 =
                   (       )

60% of 40 =
                   (       )

10% of 90 =
                   (       )

60% of 30 =
                   (       )

60% of 10 =
                   (       )

80% of 50 =
                   (       )

30% of 20 =
                   (       )

70% of 40 =
                   (       )

          +[         ]

50% of 8 =
                   ( 4 )

1% of 40 =
                   (       )

9% of 30 =
                   (       )

5% of 60 =
                   (       )

80% of 4 =
                   (       )

5% of 70 =
                   (       )

20% of 7 =
                   (       )

7% of 80 =
                   (       )

40% of 2 =
                   (       )

          +[         ]

6% of 4 =
                   ( 0.24 )

9% of 8 =
                   (       )

5% of 5 =
                   (       )

2% of 7 =
                   (       )

5% of 5 =
                   (       )

7% of 9 =
                   (       )

4% of 5 =
                   (       )

1% of 7 =
                   (       )

3% of 5 =
                   (       )

          +[         ]

       ++[[            ]]