Interior designer

To make draperies an interior designer needs 11 1/4 yards of material for the den and 8 1/2 yards for the living room. If material comes only in 20 yard bolts, how much will be left over after completing both sets of draperies?

Correct result:

x =  0.25 yd

Solution:

a=11+1/4=454=11.25 yd b=8+1/2=172=8.5 yd c=a+b=11.25+8.5=794=19.75 yd c<20 yd x=20−c=20−19.75=14=14 yd=0.25 yd

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