Gillian used
49 of the ribbon to tie some presents. She threw away
511 of the remaining ribbon. As a result, she had 40 cm of the ribbon left. How much ribbon did Gillian have at first? Give your answer in cm.
Fraction of the ribbon left after tying some presents
= 1 -
49=
59 Fraction of the remaining ribbon left after throwing away
= 1 -
511=
611
Fraction of the total ribbon left
=
59 ×
611=
1033
Length of the ribbon at first = 33 u
Length of the ribbon left = 10 u
10 u = 40
1 u = 40 ÷ 10 = 4
Length of the ribbon at first
= 33 u
= 33 x 4
= 132 cm
Answer(s): 132 cm