Gem used
25 of the ribbon to tie some presents. She threw away
78 of the remaining ribbon. As a result, she had 9 cm of the ribbon left. How much ribbon did Gem have at first? Give your answer in cm.
Fraction of the ribbon left after tying some presents
= 1 -
25=
35 Fraction of the remaining ribbon left after throwing away
= 1 -
78=
18
Fraction of the total ribbon left
=
35 ×
18=
340
Length of the ribbon at first = 40 u
Length of the ribbon left = 3 u
3 u = 9
1 u = 9 ÷ 3 = 3
Length of the ribbon at first
= 40 u
= 40 x 3
= 120 cm
Answer(s): 120 cm