Xandra used
110 of the wire to tie some presents. She threw away
78 of the remaining wire. As a result, she had 81 cm of the wire left. How much wire did Xandra have at first? Give your answer in cm.
Fraction of the wire left after tying some presents
= 1 -
110=
910 Fraction of the remaining wire left after throwing away
= 1 -
78=
18
Fraction of the total wire left
=
910 ×
18=
980
Length of the wire at first = 80 u
Length of the wire left = 9 u
9 u = 81
1 u = 81 ÷ 9 = 9
Length of the wire at first
= 80 u
= 80 x 9
= 720 cm
Answer(s): 720 cm