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If you have 10 squares and each is shaded 40 percent, then each square has 40 percent of its area shaded. To find the total shaded area in all 10 squares, you can multiply the percentage shaded by the number of squares. Therefore, 40 percent of 10 squares means that the total shaded area across all squares is equivalent to 4 full squares being shaded.
Well, darling, if you shaded all but three eighths of the rectangle, then the shaded area is 5/8 of the total rectangle. To find the percentage of the rectangle that is not shaded, you subtract the shaded area from 100%. So, 100% - 62.5% (5/8 as a percentage) = 37.5%. Voilà, 37.5% of the rectangle is not shaded.
If 63 out of 100 parts are shaded, then the fraction shaded is 63/100. To find the fraction unshaded, subtract the shaded fraction from 1 (since the total parts add up to 1): 1 - 63/100 = 37/100. Therefore, 37 out of the 100 parts are unshaded.
Average total inspection curve ( ATI curve)
it is actually very easy what you do is find the area of both shapes then if your problem is like find the chances of hitting the shaded area you do area of shaded divided by the total area of the whole object then multiply that by 100