Respuesta :
Answer:
100 percent
Step-by-step explanation:
The value 40 increases to 80 meaning it doubles its value by one hundred percent.
Answer:
40 was increased by 100%
Step-by-step explanation:
When we go from 40 to 80 we multiply by 2, therefore if we assume that
40 = 100% then 8 would equal 100% x 2 = 200%. So we can say that 40 was increased by 100%.