- A66.7%
- B60%
- C8%
- D40%
Step-by-Step Solution
Count: 8 red and 12 blue, so red : blue . Red is 2 out of every 5 beads: . (66.7% compares red with blue only, not with all beads.)
Answer: D) 40%
Simran's bracelet has red and blue beads in a repeating pattern. Write the ratio of red beads to blue beads, then find what percentage of all the beads are red.
Class 7Comparing QuantitiesComparing Quantities
Key idea: Reading the question carefully
Three things to check before you compute:
1. **What's being asked?** Profit % needs CP and SP. SI needs P, R, T.
2. **What units are the inputs in?** Time in months → convert to years (divide by 12). Rate already per annum → leave it.
3. **What's the base of the percentage?** Profit/loss % is on COST price, not selling price. Discount % is on MARKED price, not on what you actually paid.
1. **What's being asked?** Profit % needs CP and SP. SI needs P, R, T.
2. **What units are the inputs in?** Time in months → convert to years (divide by 12). Rate already per annum → leave it.
3. **What's the base of the percentage?** Profit/loss % is on COST price, not selling price. Discount % is on MARKED price, not on what you actually paid.
Master this chapter in 30 minutes a day.
Don't just memorise the answer — build a daily practice habit.
Practice 5 Similar Questions Free →All Comparing Quantities practice questions
More Class 7 Comparing Quantities practice
Aditi's tablet is charging, and the screen shows its battery. It gains 4% charge every 5…The square is cut along both diagonals, and one triangle is cut in half by a line from…What does the symbol % literally stand for?Ravi cracked open a savings box of ₹600 made up of ₹1, ₹2 and ₹5 coins in the ratio 1 :…Assertion (A): If an item bought for ₹200 is sold for ₹250, the profit % is 25%. Reason…