1.	What number is approximately 40% of 685?
		A.	320	B.	350
		C.	280	D.	420
		Hint
	2.	Find 50% of 80 mentally.
		A.	4	B.	40
		C.	20	D.	160
		Hint
	3.	Find 60% of 30 mentally.
		A.	50	B.	18
		C.	24	D.	12
		Hint
	4.	Estimate 73% of 16.
		A.	12	B.	10
		C.	8	D.	14
		Hint
	5.	Find 75% of 24 mentally.
		A.	32	B.	18
		C.	12	D.	22
		Hint