Marion used
27 of the string to tie some presents. She threw away
35 of the remaining string. As a result, she had 12 cm of the string left. How much string did Marion have at first? Give your answer in cm.
Fraction of the string left after tying some presents
= 1 -
27=
57 Fraction of the remaining string left after throwing away
= 1 -
35=
25
Fraction of the total string left
=
57 ×
25=
27
Length of the string at first = 7 u
Length of the string left = 2 u
2 u = 12
1 u = 12 ÷ 2 = 6
Length of the string at first
= 7 u
= 7 x 6
= 42 cm
Answer(s): 42 cm