Tammy used
17 of the wire to tie some presents. She threw away
78 of the remaining wire. As a result, she had 15 cm of the wire left. How much wire did Tammy have at first? Give your answer in cm.
Fraction of the wire left after tying some presents
= 1 -
17=
67 Fraction of the remaining wire left after throwing away
= 1 -
78=
18
Fraction of the total wire left
=
67 ×
18=
328
Length of the wire at first = 28 u
Length of the wire left = 3 u
3 u = 15
1 u = 15 ÷ 3 = 5
Length of the wire at first
= 28 u
= 28 x 5
= 140 cm
Answer(s): 140 cm
