Element X decays radioactively with a half life of 8 minutes. If there are 120 grams of Element X, how long, to the nearest tenth of a minute, would it take the element to decay to 4 grams?

26 is 33.33% of 78

step-by-step explanation:

26 is what percent of 78?

26 is p% of 78

equation: y = p% * x

solving our equation for p

p% = y/x

p% = 26/78

p = 0.3333

convert decimal to percent:

p% = 0.3333 * 100 = 33.33%

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