18.
Black dresses:
20%.
To write it as a decimal divide the percentage by 100
20/100 = 0.2
To write the decimal as a fraction, first add 1 as a denominator:
0.2 = 0.2/1
Now, multiply the numerator and denominator by 10 for each digit after the decimal point:
(0.2 x 10 ) /1 x 10 = 2 /10
Simplyfy by 2
1/5
SO:
Black dresses:
percentage: 20%
Decimal : 0.2
Fraction : 1/5
Same process for the rest of the clothes:
Navy:
Fraction: 1/4
Decimal : ( divide 1 by 4) = 0.25
Percentage (multiply the decimal by 100) = 25
Brown:
Decimal: 0.35
Percentage: 35 %
Fraction : 0.35/1 = 35/100=7/20
Other:
add all the decimal and subtract to 1:
0.2+0.25+0.35 = 0.8
1-0.8 = 0.2
decimal:0.2
percentage: 20%
fraction: 0.2/1 = 2/10 = 1/5