Wendy used
18 of the ribbon to tie some presents. She threw away
79 of the remaining ribbon. As a result, she had 112 cm of the ribbon left. How much ribbon did Wendy have at first? Give your answer in cm.
Fraction of the ribbon left after tying some presents
= 1 -
18=
78 Fraction of the remaining ribbon left after throwing away
= 1 -
79=
29
Fraction of the total ribbon left
=
78 ×
29=
736
Length of the ribbon at first = 36 u
Length of the ribbon left = 7 u
7 u = 112
1 u = 112 ÷ 7 = 16
Length of the ribbon at first
= 36 u
= 36 x 16
= 576 cm
Answer(s): 576 cm