Write 0.21 as a fraction in simplest form

21/100 is in simplest form.

Convert that to a decimal first
0.21 = 0.21
Now we do a fraction
21/100
That is in it's lowest terms
~Deceptiøn

The answer would be 13.5 minutes.

If you need an equation, it would be y=2x+8, y would be how long it grew, x being weeks.if you need how long he was asleep, it would be 4 weeks if he started with no beard, the equation would be x=8÷2if he did have a beard before hand, the equation would be 2w+x=8