I have £150 in a bank account. I get 5% interest a year. How much will I have at the end of the year?

£157.5

Step-by-step explanation:

To solve this problem, we simply multiply £150 by 5% and then add the sum to £150 to get the answer. Remember that we need to put 5% into the decimal form (5% -> 0.05).

£150 x 0.05 = 7.5

Now we can add 7.5 to £150.

£150 + 7.5 = £157.5

4 adults and 12 babies

step-by-step explanation:

4 x 7 = 28

12 x 15 = 180

180 + 28 =208

4 x 3 = 12

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls