If it has one decimal place, like 0.2, it's called 'two tenths' or 2/10. If it has two decimal places, like 0.34, it's called 'thirty-four hundredths' or 34/100. If it has three decimal places, like 0.842, it's called 'eight hundred forty-two thousandths' or 842/1000.
And so on...
Afterwards you can simplify the fraction by finding the greatest common factor(GCF) of the numerator and denominator, then dividing the numerator and denominator by that number.
A) 38*(1-20%)*(1-10%)=27.36 b)38*(1-30%)=26.6 c)Because in question one when you take off the 10% it is 10% of the already off price but when you take off 30% it is taking off from the original price