Erika used
37 of the thread to tie some presents. She threw away
311 of the remaining thread. As a result, she had 608 cm of the thread left. How much thread did Erika have at first? Give your answer in cm.
Fraction of the thread left after tying some presents
= 1 -
37=
47 Fraction of the remaining thread left after throwing away
= 1 -
311=
811
Fraction of the total thread left
=
47 ×
811=
3277
Length of the thread at first = 77 u
Length of the thread left = 32 u
32 u = 608
1 u = 608 ÷ 32 = 19
Length of the thread at first
= 77 u
= 77 x 19
= 1463 cm
Answer(s): 1463 cm