Ask Singapore Homework?
Upload a photo of a Singapore homework and someone will email you the solution for free.
Question
primary 6 | Maths
| Fractions
One Answer Below
Anyone can contribute an answer, even non-tutors.
Please help
Thank you
Date Posted: 5 years ago
Views: 370
Aaron increased his savings by 80%
So 100% → 180%
180% → $630
1% → $630 ÷ 180 = $3.50
100% → $3.50 x 100 = $350
Brian decreased his savings by 50%
So 100% → 50%
50% → $630
So 100% → $630 x 2 = $1260
Notice that when Calvin gave David 1/5 of his savings, their total amount of $ stays unchanged. so their total is $630 x 2 = $1260
Total savings the four children had at first
= $1260 + $1260 + $350
=$2870
So 100% → 180%
180% → $630
1% → $630 ÷ 180 = $3.50
100% → $3.50 x 100 = $350
Brian decreased his savings by 50%
So 100% → 50%
50% → $630
So 100% → $630 x 2 = $1260
Notice that when Calvin gave David 1/5 of his savings, their total amount of $ stays unchanged. so their total is $630 x 2 = $1260
Total savings the four children had at first
= $1260 + $1260 + $350
=$2870
See 1 Answer
done
{{ upvoteCount }} Upvotes
clear
{{ downvoteCount * -1 }} Downvotes
Percentage and model method.
Date Posted:
5 years ago
360 Tutoring Program