Min used
35 of the ribbon to tie some presents. She threw away
411 of the remaining ribbon. As a result, she had 252 cm of the ribbon left. How much ribbon did Min have at first? Give your answer in cm.
Fraction of the ribbon left after tying some presents
= 1 -
35=
25 Fraction of the remaining ribbon left after throwing away
= 1 -
411=
711
Fraction of the total ribbon left
=
25 ×
711=
1455
Length of the ribbon at first = 55 u
Length of the ribbon left = 14 u
14 u = 252
1 u = 252 ÷ 14 = 18
Length of the ribbon at first
= 55 u
= 55 x 18
= 990 cm
Answer(s): 990 cm