How to make a legend print proper numbers

How do i get the legend to do i print r values of 0.05, 0.1 and 0.5 . I want them to be the same as 1 and 10

colourmap = [228 26 28; 55 126 184; 77 175 74; ...
    152 78 163; 255 127 0]/255;
%variables
r = [0.05 0.1 0.5 1 10];
t = (0:0.01:100);
k = 15
B0 = 1;

%
for i = 1: length(r)
    dBdt =@(t,B) (round(r(i)).*B).*(1-(B./k));
    [t,B] = ode45(dBdt,t,B0);
    figure(6);
    loglog(t,B,'color',colourmap(i,:))
    grid on;
    hold on;
    
    %loop for b >= 10
end

xlabel('Time');
ylabel('Bacteria growth');
title('B against t');
legend(cellstr(num2str(r','r = %d')),'location','northwest');

Here is the result of the graph

Answer 1

[Ameer Hamza]

Try this

legend(num2str(r','r = %5.2f'),'location','northwest'); % cellstr is not required

%d is used for integer values. You need to use %f for floating point values.