Tammy used
311 of the ribbon to tie some presents. She threw away
34 of the remaining ribbon. As a result, she had 10 cm of the ribbon left. How much ribbon did Tammy have at first? Give your answer in cm.
Fraction of the ribbon left after tying some presents
= 1 -
311=
811 Fraction of the remaining ribbon left after throwing away
= 1 -
34=
14
Fraction of the total ribbon left
=
811 ×
14=
211
Length of the ribbon at first = 11 u
Length of the ribbon left = 2 u
2 u = 10
1 u = 10 ÷ 2 = 5
Length of the ribbon at first
= 11 u
= 11 x 5
= 55 cm
Answer(s): 55 cm