80% of 50 =
                   ( 40 )

60% of 20 =
                   (       )

70% of 50 =
                   (       )

20% of 20 =
                   (       )

70% of 30 =
                   (       )

70% of 20 =
                   (       )

80% of 70 =
                   (       )

30% of 40 =
                   (       )

80% of 50 =
                   (       )

          +[         ]

60% of 1 =
                   ( 0.6 )

20% of 5 =
                   (       )

90% of 4 =
                   (       )

6% of 80 =
                   (       )

80% of 6 =
                   (       )

6% of 80 =
                   (       )

30% of 9 =
                   (       )

8% of 10 =
                   (       )

50% of 3 =
                   (       )

          +[         ]

7% of 50 =
                   ( 3.5 )

80% of 5 =
                   (       )

5% of 90 =
                   (       )

2% of 70 =
                   (       )

8% of 10 =
                   (       )

6% of 70 =
                   (       )

3% of 50 =
                   (       )

1% of 20 =
                   (       )

30% of 5 =
                   (       )

          +[         ]

       ++[[            ]]