Daytime fatigue from mild dehydration occurs in approximately % of americans.. 95 %. 85 %. 75 %. 65 %

The third choice, 75%, is the most suitable for the situation given above. In an online consensus, 75% of the Americans are dehydrated during daytime. However, this statistics is still not accepted by medical sciences. It is then propose to emphasize the importance of getting hydrated to carry on daily tasks. 

If it's a smaller child or infant, place one on the middle of the chest and on the child's back. (if it is a bigger child with enough room for two, place one on the upper right/your left of the chest, and one on the lower left/your right) the pads should never touch each other.