%path = "maths/linear system/blending" %kind = chindnum["problems"] %level = 10 Three types of oils S1 ({{chiven.A[0][0]}} €/l), S2 ({{chiven.A[0][1]}} €/l) and S3 ({{chiven.A[0][2]}} €/l) shall be blended to produce an oil that costs {{"{0:.2f}".format(chiven.b[0])}} €/l, which is cheaper than the expensive oil S1. The other two oils shall make up {{int(-100*chiven.A[1][0])}}% of the volume of S1. What are the respective portions of the oils rounded to full percentages? %chq(chames=chutil.F(['S{0} = '],[1,2,3]))