Glen and Joelle share some erasers.
47 of Glen's erasers is equal to
411 of Joelle's erasers. Given that Glen has 20 erasers less than Joelle, how many erasers do they have altogether?
47 of Glen's erasers = 411 of Joelle's erasers
Number of Glen's erasers = 7 u
Number of Joelle's erasers = 11 u
Number of erasers that Glen has less than Joelle
= 11 u - 7 u
= 4 u
4 u = 20
1 u = 20 ÷ 4 = 5
Total number of erasers
= 7 u + 11 u
= 18 u
= 18 x 5
= 90
Answer(s): 90
