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6. true
7. false
Step-by-step explanation:
how to find the answers:
turn % into decimals ( ÷ 100)
6.
80% ÷ 100 = 0.8
0.8 x 45 = 36
45 - 36 = 9
7.
55% ÷ 100
0.55 x 40 = 22
22 + 16 = 38
this is not true (b).