Vanessa had 140 crayons.
45 of them were gold crayons and the rest were white crayons. After she had given away some gold crayons, the ratio of the number of gold crayons to the number of white crayons became 3 : 4. How many gold crayons did she give away?
| |
Gold |
White |
Total |
| Before |
4x4 =
16 u |
1x4 =
4 u |
5x4 =
20 u |
| Change |
- 13 u |
|
|
| After |
3 u |
4 u |
7 u |
The number of white crayons remained unchanged.
LCM of 1 and 4 = 4
Total number of crayons at first = 20 u
20 u = 140
1 u = 140 ÷ 20 = 7
Number of gold crayons that she gave away
= 16 u - 3 u
= 13 u
= 13 x 7
= 91
Answer(s):91
