Pamela used
49 of the string to tie some presents. She threw away
310 of the remaining string. As a result, she had 84 cm of the string left. How much string did Pamela have at first? Give your answer in cm.
Fraction of the string left after tying some presents
= 1 -
49=
59 Fraction of the remaining string left after throwing away
= 1 -
310=
710
Fraction of the total string left
=
59 ×
710=
718
Length of the string at first = 18 u
Length of the string left = 7 u
7 u = 84
1 u = 84 ÷ 7 = 12
Length of the string at first
= 18 u
= 18 x 12
= 216 cm
Answer(s): 216 cm