Erika and Emma have $227. Abi and Erika have $245. The ratio of Emma to Abi is 2 : 3. How much does Erika have?
Amount that Emma has = 2 u
Amount that Abi has = 3 u
The amount that Erika has is the repeated identity.
Erika + 2 u = 227 --- (1)
Erika + 3 u = 245 --- (2)
(2) - (1)
3 u - 2 u = 245 - 227
1 u = 18
From (1):
Erika + 2 u = 227
Erika + 2 x 18 = 227
Erika + 36 = 227
Amount that Erika has
= 227 - 36
= $191
Answer(s): $191
