Please just write down the ansswers and i will mark you brainliest only if you get the answer correct and yes all of them.
1)Max completed 140 questions on DFM last week.
This week, Max completed 182 questions.
Find the percentage increase.
2) Last week, Jamie counted the number of rice grains in his plate, and found he had 250grains.He had rice this week, and counted only 175grains.Find the percentage decrease.
3)The mass of a chocolate bar is increased by 15%
The mass of the chocolate bar used to be 340g.
Work out the new mass of the chocolate bar.
PLEASE ANSWER IM GONNA MARK YOU BRAINLIEST ONLY IF U GET CORRECT!!!
Answers
Step-by-step explanation:
1) questions completed in first week=140
questions completed in second week=182
increased number=182-140=42
percentage increase=increase number / original number x 100%
=>(42/140) x 100%
=>(3/10) x 100%
3 x 10=30%
therefore increase percent =30%
2) grains found in first week=250
grains found in second week=175
difference in grains= 250-175=75
decrease percent =(decrease/original no.) x 100%
=(75/250) x 100%
=(3/10) x 100%
=3 x 10%
=30%
therefore the decrease percent= 30%
3) original mass of the chocolate bar= 340gms
increased by = 15%
new mass=340 + 15%
first lets find out 15 % of 340
=340 x 15%
=340 x 15/100
= 34 x 1.5
= 51
now, lets add 340 and 51 to get new value
=340+51=391
therefore the new mass of chocolate is 391 grams