Tiffany baked 210 cookies. She gave 50 cookies to George and some cookies to Riordan. She had
47 of the total cookies left.
- How many cookies did she have left?
- What fraction of the total cookies did she give to Riordan?
(a)
Total number of cookies = 7 u
7 u = 210
1 u = 210 ÷ 7 = 30
Number of cookies that Tiffany had left
= 4 u
= 4 x 30
= 120
(b)
Number of cookies that Tina gave to Riordan
= 210 - 120 - 50
= 40
Fraction of the total cookies that Tiffany gave to Riordan
=
40210=
421Answer(s): (a) 120; (b)
421