Mai had 120 game cards. She bought $$ 25 \% $$ more cards. Mai then gave $$ 40 \% $$ of the cards to her brother. a Find the number of cards after she bought more. b Find the number of cards Mai had left after she gave some to her brother.

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Let's solve the problem step by step.

**Given:**
- Mai initially has **120** game cards.
- She buys **25%** more cards.
- She then gives **40%** of her total cards to her brother.

### a) Number of Cards After She Bought More

1. **Calculate 25% of the initial cards:**
   
   $$
   25\% \text{ of } 120 = 0.25 \times 120 = 30 \text{ cards}
   $$
   
2. **Add the additional cards to the initial number:**
   
   $$
   120 \text{ cards} + 30 \text{ cards} = 150 \text{ cards}
   $$
   
   **Answer:** Mai has **150 cards** after buying more.

### b) Number of Cards Left After Giving Some to Her Brother

1. **Calculate 40% of the total cards (150) that she gives to her brother:**
   
   $$
   40\% \text{ of } 150 = 0.40 \times 150 = 60 \text{ cards}
   $$
   
2. **Subtract the given cards from the total to find the remaining cards:**
   
   $$
   150 \text{ cards} - 60 \text{ cards} = 90 \text{ cards}
   $$
   
   **Answer:** Mai has **90 cards** left after giving some to her brother.

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**Summary:**
- **a)** After purchasing more, Mai has **150 cards**.
- **b)** After giving away 40%, she is left with **90 cards**.
**a) Mai has 150 cards after buying more.** **b) Mai has 90 cards left after giving some to her brother.**

Mai had 120 game cards. She bought \( 25 \% \) more cards. Mai then gave \( 40 \% \) of the cards to her brother. a Find the number of cards after she bought more. b Find the number of cards Mai had left after she gave some to her brother.

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