Term 1 · Weeks 1–2 · Earning Money and Percentages

Challenge problem · non-routine

Challenge Non-routine

Urea fertiliser rose from ₱1,400 to ₱1,750 per bag. A farmer uses 8 bags per hectare on 3 hectares. By how many pesos did the fertiliser cost increase, and what is the percentage increase? Enter the peso increase.

Show step-by-step solution

Answer: 8400 ₱

Increase per bag: $1{,}750 - 1{,}400 = 350$ ; percentage $350/1{,}400 = 25\%$ .
Bags used: $8 \times 3 = 24$ .
Extra cost: $24 \times 350 = 8{,}400$ pesos.

Common errors to watch for

Computing for one hectare only (₱2,800).

Budget of Work competencies

gm11.t1.w1.c2
Apply a percentage increase or decrease in various contexts: