Answer:
32 is 40% of 80.
Step-by-step explanation:
80×4÷10=320÷10=32
Answer:
2
Step-by-step explanation:

because 
So,

Answer:
20
Step-by-step explanation:
20 x 2 =40
40 is under 58 and the closest to 58
the next 10 is 30 and 30 x 30 is over 58 with 60
7/10-3/10=2/5
3/10+1/10=2/5