Find 50% of 40.
20
50/100 × 40 = 20.
Day 054Finding the Percent Part
Standards 6.RP.A.3c
LEARNING TARGET
I can find the part when I know the percent and whole.
01 · LEARN
Build the idea
Use part = (percent/100) × whole. You may also find 10%, 5%, or 1% and combine equal pieces. Label the part in the same units as the whole.
Find 15% of 220. Then explain a mental-math or fraction strategy that checks your answer.
33
15/100 × 220 = 33.
02 · PRACTICE
Your turn
Work in order. Start with the foundations, then build toward explanation and application.
Find 20% of 60.
Find 50% of 60.
Find 25% of 100.
Find 25% of 220.
Find 5% of 180.
Find 15% of 200.
Find 30% of 80. Then explain a mental-math or fraction strategy that checks your answer.
Find 5% of 40. Then explain a mental-math or fraction strategy that checks your answer.
Find 40% of 220. Then explain a mental-math or fraction strategy that checks your answer.
Find 60% of 240. Then explain a mental-math or fraction strategy that checks your answer.
03 · CHECK
Answers and reasoning
Reveal the teacher answer key
- 12
20/100 × 60 = 12.
- 30
50/100 × 60 = 30.
- 25
25/100 × 100 = 25.
- 55
25/100 × 220 = 55.
- 9
5/100 × 180 = 9.
- 30
15/100 × 200 = 30.
- 24
30/100 × 80 = 24.
- 2
5/100 × 40 = 2.
- 88
40/100 × 220 = 88.
- 144
60/100 × 240 = 144.