Percent Change

Amount of Water for Sand Mass Movement

Trial 1
(300 - 100)/100 x 100 = 200%
300 - 100 = 200 200/100 = 2 2 x 100 = 200%
Trial 2
(150 - 100)/100 x 100 = 50%
150 - 100 = 50 50/100 = .5 .5 x 100 = 50%
Average
(200 + 50)/2 = 125% 250/2 = 125%

Amount of Water for Soil Mass Movement

Trial 5
(320 - 100)/100 = 220%
320 -100 = 220 220/100 = 2.2 2.2 x 100 =220%
Trial 6
(400 - 100)/100 x 100 = 300%
400 - 100= 300 300/100 = 3 3 x 100 = 300%

220 + 300 = 520 520/2 = 260%


The sand is more prone to slide than the soil.