Term 1 · Weeks 6–9 · Units and Conversion

Challenge problem · non-routine

Challenge Non-routine

Last year the rate was ₱55.00 per dollar; this year it is ₱57.50. An OFW sends the same US$400 monthly. By what percentage did the peso amount the family receives increase? Round to two decimal places.

Show step-by-step solution

Answer: 4.55 %

Last year: $400 \times 55 = 22{,}000$ ; this year: $400 \times 57.50 = 23{,}000$ .
Increase: $1{,}000$ ; percentage $= 1{,}000/22{,}000 \approx 4.55\%$ .
The percentage equals the change in the rate itself: $2.50/55 \approx 4.55\%$ .

Budget of Work competencies

gm11.t1.w8.c2
Solve problems involving the conversion of currencies.
gm11.t1.w1.c2
Apply a percentage increase or decrease in various contexts: