Gwen used
29 of the thread to tie some presents. She threw away
34 of the remaining thread. As a result, she had 28 cm of the thread left. How much thread did Gwen have at first? Give your answer in cm.
Fraction of the thread left after tying some presents
= 1 -
29=
79 Fraction of the remaining thread left after throwing away
= 1 -
34=
14
Fraction of the total thread left
=
79 ×
14=
736
Length of the thread at first = 36 u
Length of the thread left = 7 u
7 u = 28
1 u = 28 ÷ 7 = 4
Length of the thread at first
= 36 u
= 36 x 4
= 144 cm
Answer(s): 144 cm